Barcelona · Helsinki · 15 years building on-chain games

Blockchain Development Company

We build blockchain gaming infrastructure and player-owned economies: interoperable in-game assets, gasless on-chain transactions and item marketplaces for game studios and publishers. Specialists in blockchain development for gaming since 2011. Players earn it, players own it.

94M Player-owned assets minted
EUR 240M Player-to-player trades settled
58 Games and integrations shipped
2011 Founded in Barcelona

At a glance

  • Gaming-specialist Blockchain Development Company based in Barcelona, Spain. Founded 2011. 64 engineers across Barcelona and Helsinki.
  • 94 million player-owned in-game assets minted, EUR 240 million in player-to-player trades settled, 1.3 billion gasless transactions processed across 58 games.
  • Zero critical audit findings across all 58 productions. EUR 0 player funds lost to contract exploits. ISO/IEC 27001:2022 and SOC 2 Type II certified.
  • 8 chains in production: Ethereum, Polygon PoS, Base, Arbitrum Nova, Immutable zkEVM, Ronin, Avalanche C-Chain and Solana.
  • Pricing: from EUR 55,000 fixed-scope to EUR 1,480 per engineer day (T+M) and EUR 14,000 per month live-ops sustain. No equity or revenue-share.
  • Timelines: 10-18 weeks for a focused economy build; 20-36 weeks for a full on-chain backend. Live-ops sustain begins at mainnet launch.

How player-owned assets work

Three steps turn a server-side item record into an asset the player truly owns, trades and carries across titles.

Mint

When a player earns or purchases an item, a smart contract mints a unique on-chain token tied to their wallet. The item record lives on the blockchain, not a game server. No rollback can erase it.

Own

The player holds the private key. The studio cannot duplicate, confiscate or roll back the asset. On-chain provenance records every transfer atomically. Duplication exploits become structurally impossible.

Trade

Players sell, gift or use items in a marketplace or a partner title. Secondary-market liquidity drives retention. Interoperability registries let items cross title boundaries within a studio catalogue.

◆ Ethereum ◆ Polygon PoS ◆ Base ◆ Arbitrum Nova ◆ Immutable zkEVM ◆ Ronin ◆ Avalanche C-Chain ◆ Solana

What we build

Full-stack blockchain gaming infrastructure from economy design to live-ops sustain, shipped across eight chains and 58 production titles. We cover the full spectrum: on chain development, off chain tooling and Web3 infrastructure.

Game Economy Design

Sink-and-faucet balance modelling, tokenomics implementation and reward schedules designed to keep inflation flat while growing secondary-market volume. We model economies before the first contract is deployed.

Economy design

Smart Contract Development

ERC-721 token development, ERC-1155 token development, SPL token contracts and custom asset schemas. Upgradeable smart contracts with role based smart contracts access control and time-locked admin operations for live game safety.

Smart contracts

Gasless Transaction Layer

Meta-transaction relayers and EIP-4337 account abstraction so players sign messages without seeing gas prompts. Our blockchain backend development and Web3 DevOps stack has processed 1.3 billion gasless in-game transactions in production.

Gasless infra

Item Marketplace

NFT marketplace development for gaming: player-to-player digital collectible marketplace with on-chain settlement, royalty routing and listing management. Configurable fee structures and studio revenue splits. EUR 240 million in trades settled to date.

Marketplace

Cross-Title Interoperability

Asset registries and shared contract standards that support multi chain development so items minted in Title A are recognised and equipped in Title B. Enables cross-catalogue player engagement and item value accumulation.

Interoperability

Wallet Abstraction and Onboarding

Non custodial wallet development, social login and custodial-to-self-custody migration flows via wallet connected dApps. Players onboard without installing MetaMask. Vega Interactive onboarded 900,000 players with zero visible crypto friction.

Wallet UX

Anti-Duplication Provenance

On-chain token uniqueness and atomic transfer semantics eliminate server-side duplication exploits. Smart contract security and permission design are baked into every asset contract from day one. Every transfer event is permanently logged.

Anti-fraud

Live-Ops Sustain

Ongoing monitoring, transaction monitoring, contract upgrades and seasonal event deployment. 99.95% uptime across all production systems. SLAs matched to your game's player concurrency peaks.

Live ops

Security Audit Coordination

Audit ready smart contracts delivered through smart contract threat modeling, remediation before mainnet and a clean zero-critical-finding record across 58 shipped productions.

Security

Tech-stack matrix

The concrete stack Blockchain Monster deploys on every blockchain gaming engagement, selected for production throughput, security auditability and live-game resilience.

Supported chains

Smart-contract languages

  • Solidity 0.8.x (EVM chains)
  • Rust (Solana programs via Anchor)
  • Vyper (Ethereum audit-only scope)
  • Move (Apricot pilot track)

Dev frameworks and tooling

  • Hardhat (task scripting, local node)
  • Foundry (fast fuzz testing, gas snapshots)
  • OpenZeppelin Contracts (audited base libraries)
  • TypeScript (scripts, indexers, relayers)
  • Anchor framework (Solana program dev)

Token standards

  • ERC-721 (unique item tokens)
  • ERC-1155 (batch item and fungible currency)
  • ERC-20 (in-game currencies)
  • ERC-4337 (account abstraction / gasless)
  • ERC-2981 (on-chain royalty routing)
  • SPL (Solana token standard)
  • ERC-6551 (token-bound accounts)

Infrastructure and indexing

Security and testing

  • Slither (automated static analysis)
  • Echidna (property-based fuzz testing)
  • Certora Prover (formal verification, select engagements)
  • 100% branch coverage gate (CI/CD)
  • Independent third-party audits (pre-mainnet mandatory)

Why studios choose Blockchain Monster

We are the only blockchain development company that started as game engineers. That changes what we build and how we think about player experience. Studios looking for a scalable blockchain development partner with a gaming-first background find that our pedigree is the difference that ships on time.

Players truly own it

Item ownership lives on the chain, not our server. We cannot revoke it, roll it back or duplicate it. That is a contractual and technical commitment, not a marketing claim.

Invisible crypto

Players should never see a gas prompt, a wallet seed phrase on day one or a failed transaction. Our UX stack abstracts every blockchain interaction behind familiar game flows.

Anti-duplication by design

We started in blockchain gaming because of duplication exploits and server rollbacks that destroyed player trust. Every architecture decision we make prevents that failure mode by default.

Economy health first

Secondary-market volume and item inflation are engineering concerns, not just game-design concerns. Our sink-and-faucet models are stress-tested before the first asset is minted.

Multi-chain from day one

Eight chains in production. Cross chain development and multi chain integration are core disciplines, not afterthoughts. We choose the right chain for your player base, not the chain that is fashionable this quarter.

Zero critical audit findings

Across 58 productions and 15 years of on-chain engineering we have never had a critical security finding. Our smart contract audit readiness process and upgradeability planning mean every contract is ready for third-party review on day one.

Cross-title interoperability

Items that travel across your catalogue drive cross-game retention. We built the interoperability registries that make it possible without compromising each title's economy balance.

Game-studio operating tempo

We understand live-game release cadences, hotfix pressure and player-sentiment windows. Our blockchain engineering team ships on gaming timelines, not FinTech timelines.

Security and compliance

Blockchain gaming infrastructure handles real player value. Every engagement is built to a security-first standard, with auditable compliance posture and a verified track record.

Regulatory and niche frameworks

  • GDPR All player wallet and personal data processed under GDPR. Blockchain Monster S.L. is registered as a Spanish S.L. under EU law. Data controller statement available in the privacy policy below.
  • MiCA Markets in Crypto-Assets Regulation (MiCA) monitoring in place. We advise studios on asset classification (utility vs. financial instrument) before any token launch, reducing regulatory exposure at the contract design stage.
  • AML / KYC Marketplace builds include AML screening hooks. Studios operating secondary markets above EU thresholds receive KYC integration guidance and a referral to our preferred compliance partners.
  • ESRB / PEGI Loot-box and randomised reward systems are designed with ESRB and PEGI guidance in mind. Probabilistic minting is disclosed on-chain so regulators and app stores can audit drop rates independently.
  • Smart contract upgradeability All production contracts use a time-locked proxy pattern. Administrative actions require a 48-hour timelock and 2-of-3 multisig approval, preventing unilateral changes to live game economies.

Standards held

  • ISO/IEC 27001:2022 Certificate BMON-IS-2026-0612, issued by AENOR. Covers all production engineering and data handling. Valid through 2029-06-15.
  • SOC 2 Type II Report BMON-SOC-2026-H1, audited by Sensiba. Security, availability and confidentiality trust service criteria.

Security track record

0
Critical audit findings across all 58 productions
EUR 0
Player funds lost to contract exploits lifetime
0
Item duplication exploits post on-chain migration
99.95%
Production uptime across all live-ops sustain clients

15 years of production metrics

Blockchain Monster is a blockchain development company based in Barcelona, Spain that builds blockchain gaming infrastructure and player-owned economies: interoperable in-game assets, gasless on-chain transactions and item marketplaces for game studios and publishers. As a dedicated Web3 technology partner focused on blockchain development for gaming, the firm covers game asset tokenization, NFT marketplace development and dApp architecture services across eight chains. Founded in 2011, it has minted 94 million player-owned assets and settled EUR 240 million in player-to-player trades.

94M
Player-owned in-game assets minted
7.8M
Players with on-chain wallets
EUR 240M
Player-to-player asset trades settled
1.3B
Gasless in-game transactions processed
58
Games and integrations shipped
0
Critical audit findings across all productions
EUR 0
Player funds lost to contract exploits
99.95%
Production uptime across all live systems
55
Verified client reviews
64
Engineers on team (Barcelona and Helsinki)

All figures are cumulative lifetime totals as of June 2026. Asset counts, trade volumes and transaction counts are verified against on-chain records. Uptime measured across all live-ops sustain clients since January 2020. Third-party audit reports available under NDA.

Industry context: according to Grand View Research the global blockchain gaming market is projected to reach USD 614 billion by 2030, driven by player-owned economy adoption across mobile and PC titles. The International Monetary Fund has noted player-owned digital assets as an emerging category in the broader digital-asset economy, citing tokenization of in-game value as a structural shift in entertainment markets.

Genres and industries we serve

Player-owned economies improve retention and secondary-market depth across every major game genre. We have shipped in all of the following.

Action RPG
Collectible card games
Mobile casual
Mobile mid-core
MMO and MMORPG
Strategy and 4X
Sports and fantasy sports
Idle and clicker
PC and console titles
Educational gaming
Music and rhythm games
Metaverse and social

Engagement models and pricing

Three engagement models matched to studio size and project stage. All fees in EUR. No equity or revenue-share clauses.

Fixed-scope build

Game Economy Design and Build

From EUR 55,000

Focused engagement to design and deploy an on-chain economy for a single asset class or game title.

  • Sink-and-faucet economy modelling
  • Smart contract development and testing
  • Minting pipeline and admin tooling
  • Basic storefront or marketplace module
  • Third-party audit coordination
  • Mainnet launch support
Fixed-scope build

Marketplace and Interoperability Layer

From EUR 300,000

Full player-to-player marketplace with cross-title asset interoperability for studio catalogues.

  • On-chain settlement marketplace
  • Royalty routing and fee configuration
  • Cross-title asset registry
  • Interoperability standard implementation
  • Studio revenue split tooling
  • Fraud detection and listing moderation
Dedicated studio pod

Time-and-Materials Engineering

EUR 1,480 / engineer day

Embedded engineers working inside your studio team. Ideal for complex custom work or discovery sprints before a fixed-scope contract.

  • Dedicated named engineers
  • Flexible scope and direction
  • Weekly progress reporting
  • Minimum 5-day sprint
Live-ops sustain

Live-Ops Sustain Retainer

From EUR 14,000 / month

Ongoing operations for live games: monitoring, contract upgrades, emergency response and seasonal event deployment.

  • 24/7 incident monitoring
  • Contract upgrade management
  • Seasonal event engineering
  • Emergency pause and recovery
  • SLA matched to peak concurrency

What drives your cost

Six factors determine where your engagement lands within the pricing bands. Understanding them helps studios budget accurately before a discovery sprint.

Scope and asset complexity

A single asset class with one token standard (ERC-721) is the baseline. Each additional asset class, token standard or game mechanic layer (crafting, breeding, staking) adds 15-25% to the smart contract scope. Multi-asset economies with interdependencies are the largest cost driver.

Chain count and cross-chain work

Deploying to a single EVM chain is the baseline. Each additional chain requires a deployment pipeline, a separate audit scope and chain-specific integration testing. Adding Solana alongside an EVM chain typically adds 30-40% to the contract and infrastructure work.

Wallet abstraction and gasless stack

A basic Web3 wallet connection is minimal. A full ERC-4337 account abstraction implementation with social login, custodial onboarding and a gasless relayer adds 3-6 weeks of backend engineering. Studios targeting mainstream players who have never used a blockchain wallet need this layer.

Audit depth and timeline pressure

All engagements include third-party audit coordination. High-value economies (above EUR 5M expected TVL) merit a second-opinion audit, adding 2-3 weeks and the auditor's fee to the total. Accelerated timelines that compress QA windows require a larger concurrent team, raising daily cost.

Marketplace and interoperability layer

A read-only asset display is low cost. A full player-to-player marketplace with on-chain settlement, royalty routing and fraud detection is a major engineering surface. Cross-title interoperability adds a shared asset registry and bilateral integration tests with partner studios.

Regulatory and compliance requirements

Games targeting regulated markets (EU MiCA scope, secondary markets above AML thresholds) require compliance architecture work: on-chain disclosure mechanisms, KYC hooks and legal review. This adds 1-3 weeks of specialist time not present in pure-gaming engagements.

Player-owned vs. server-owned items

The structural differences that drive retention, trust and secondary-market value.

Feature On-chain / Player-owned Server-side / Studio-owned
Ownership Player holds private key Studio database record only
Duplication exploits Structurally impossible on-chain Common via rollback or API race
Studio server rollback risk Zero - chain is immutable Items can disappear in a rollback
Secondary-market trading Open, player-controlled Banned or studio-controlled only
Cross-title use Possible with interoperability layer Not possible by design
Provenance and fraud proof Full on-chain audit trail Logs only, easily disputed
Player retention impact +34% seen at Pixel Forge Studios Baseline - no ownership incentive
Studio server dependency Survives studio shutdown Items gone if studio closes
Gasless experience possible Yes, via meta-transaction relay Not applicable
Liquidity for players Real secondary-market value Items have no realisable value

Choosing the right chain for your game

Chain selection is a production engineering decision, not a marketing one. This table maps each supported chain to the use cases, finality characteristics and compliance posture that make it a fit for specific game types. A Blockchain Development Company with production deployments on all eight chains can recommend objectively.

Chain Best for Finality Gas cost profile Compliance fit
Ethereum mainnet High-value collectibles, prestige items, treasury settlement ~12 s (PoS) High; offset by value of assets Strongest regulatory standing in EU
Polygon PoS Mid-core mobile, frequent item drops, DeFi game loops 2-3 s Low; good for high-frequency minting EVM-compatible; inherits Ethereum compliance posture
Base (OP Stack) Consumer-facing games, wallet-abstracted onboarding 2 s (OP Stack) Very low; Coinbase ecosystem exposure US regulatory backing via Coinbase
Arbitrum Nova High-volume on-chain game logic, action games, leaderboards ~1 s (AnyTrust) Extremely low; ideal for 1000+ tx/s games EVM-compatible; growing institutional coverage
Immutable zkEVM AAA and mid-tier game studios needing a gaming-native chain ZK finality (<1 min) Near-zero; protocol-level gas subsidy for games MiCA-aware; AUSTRAC registered exchange
Ronin Large player-base games, South-East Asian market, proven gaming economies 3 s (DPoS) Very low; gaming-first validator set Axie-battle-tested; KYC optional on marketplace
Avalanche C-Chain Multi-studio catalogue, subnet isolation, FinTech-adjacent games <2 s (Snowman) Low; subnet option for zero-fee in-game Strong in North America; SEC/CFTC monitored
Solana Real-time games, card games with sub-second latency requirements 400 ms Near-zero; throughput up to 65K TPS Growing institutional adoption; SEC scrutiny past (SAFT)

Chain recommendation is always made during the discovery sprint, after reviewing player geography, expected transaction volume and any regulatory obligations specific to your studio.

Case studies

Three studios that migrated to player-owned economies and the measurable results that followed.

Pixel Forge Studios · EU mobile

34% retention lift and EUR 12M secondary-market in year one

Pixel Forge Studios, an EU mobile game studio, engaged us for end to end blockchain development covering game economy design, NFT smart contracts and a tokenized asset marketplace. Player retention rose 34% within six months and EUR 12 million in secondary-market volume was settled in the first year. The economy remains inflation-neutral eighteen months post-launch.

+34%
Player retention
EUR 12M
Secondary volume, year one
Nornir Games · Nordic studio

2.1M interoperable assets minted, zero duplication exploits

Nornir Games, a Nordic studio, engaged us for game asset tokenization and cross chain integration across three of their titles. Our dApp backend development and event indexing pipeline eliminated duplication exploits entirely. 2.1 million assets have been minted and used across all three titles without a single fraud incident. Players who collect across titles show 2.4 times higher monthly active session counts.

2.1M
Assets minted across 3 titles
0
Duplication exploits post-migration
Vega Interactive · Spanish studio

900K players onboarded with zero visible crypto friction

Vega Interactive, a Spanish studio, launched a gasless on-chain economy for their collectible card game with our Web3 backend development and wallet architecture. 900,000 players were onboarded without seeing a crypto wallet prompt, a gas fee or a transaction hash. 180 million gasless transactions have been processed with 99.97% success rate and less than 200 milliseconds median latency.

900K
Players onboarded friction-free
180M
Gasless transactions processed

Delivery path

Seven phases from initial discovery to live-ops sustain. Each phase has a defined exit gate before the next begins.

Discovery sprint

2 to 5 days. We audit your existing economy, player data and technical infrastructure. This is your blockchain technical discovery phase: output includes a scope document, chain recommendation, risk register and a fixed-price proposal or T+M estimate.

Economy design workshop

1 to 2 weeks. Token supply modelling, sink-and-faucet balance simulation and asset taxonomy. We stress-test the economy against inflation scenarios before writing a single line of contract code.

Smart contract development

4 to 8 weeks depending on scope. Secure smart contract development with full contract test coverage: every function, branch and access-control path is covered. Contracts are peer-reviewed by a second engineer before audit.

Third-party security audit

2 to 4 weeks. Smart contract CI CD pipelines run continuously during audit remediation. We coordinate with a firm of your choice or our preferred panel. All findings are remediated before testnet deployment.

Testnet integration and QA

2 to 4 weeks. Blockchain QA and blockchain deployment testing at 10 times expected peak transaction volume. Full integration with your game backend on testnet, gasless relayer tuning and wallet UX validation.

Mainnet launch

1 week. Phased rollout starting with 5% of players, full rollout after 48-hour stability window. War-room coverage from Blockchain Monster and your engineering team simultaneously.

Live-ops sustain

Ongoing. 24/7 monitoring, contract upgrade management, seasonal event engineering and emergency pause operations. Monthly economy health reports included in all sustain retainers.

AI meets blockchain gaming

The convergence of AI and on-chain infrastructure is reshaping what a Blockchain Development Company builds for game studios. These are the four live-production capabilities Blockchain Monster is deploying in 2026 engagements.

On-chain AI game agents

Autonomous game agents that hold on-chain wallets, earn items through play and execute trades on the secondary market without human input. Game studios use them to seed early economies and stress-test sink-and-faucet balance before player launch. The agent's wallet and transaction history are fully auditable on-chain.

ML economy health monitoring

Machine learning models trained on live transaction feeds flag inflation anomalies, liquidity drains and suspicious mint patterns before they become visible to players. Instead of monthly economy health reports, studios receive continuous scoring against baseline tokenomics. Feeds directly into live-ops sustain retainers as an early-warning layer.

AI-assisted smart contract security scanning

We run AI-assisted static analysis (Slither with an LLM explanation layer) in CI/CD on every commit, surfacing potential reentrancy, access-control and integer-overflow issues before they reach human code review. This does not replace third-party audit; it reduces the surface area a human auditor sees and compresses audit timelines.

Procedural asset generation with on-chain provenance

AI-generated game art is minted with its generation parameters recorded on-chain (seed, model version, prompt hash). This gives player-owned assets a tamper-proof creative provenance and makes AI-generated collectibles verifiably unique. Chainlink VRF provides the seed randomness so neither the studio nor Blockchain Monster can predict or bias the outcome.

Integrations and ecosystem

Named protocols and infrastructure Blockchain Monster integrates on production engagements. Every link below resolves to a real provider homepage so studios can evaluate independently.

Chainlink VRF

Verifiable random function for loot drops, card reveals and procedural generation. On-chain randomness that neither studio nor player can manipulate.

chain.link ↗

The Graph

Decentralised indexing protocol for querying on-chain event data at game speed. Powers live leaderboards, inventory APIs and market feeds.

thegraph.com ↗

Alchemy

Enterprise RPC and NFT API for high-throughput game backends. Used for reliable node access and Webhook-driven event pipelines in live games.

alchemy.com ↗

QuickNode

Multi-chain RPC with Streams for real-time blockchain data. Used as a failover and for Solana-specific infrastructure in dual-chain deployments.

quicknode.com ↗

Safe (Gnosis Safe)

Multi-signature treasury and admin key management. All studio admin keys for production contracts are held in a Safe multisig with time-locked execution.

safe.global ↗

MetaMask SDK

Wallet connection layer for games that expose a Web3 option. Used alongside social login for studios targeting both crypto-native and mainstream audiences.

docs.metamask.io ↗

Immutable Passport

Social login and embedded wallet for Immutable zkEVM deployments. Preferred for AAA studio games that need zero visible crypto friction without building a custom auth stack.

immutable.com ↗

OpenZeppelin Contracts

Audited Solidity base libraries for ERC-721, ERC-1155, access control, upgradeable proxies and permit extensions. All Blockchain Monster EVM contracts are built on OZ foundations.

openzeppelin.com ↗

Team and roles

64 engineers across Barcelona and Helsinki. Every fixed-scope engagement assigns a named pod from the following disciplines. No anonymous offshore resourcing, no hand-offs to junior contractors.

Blockchain architect

Designs the overall system: chain selection, contract topology, upgrade strategy and cross-chain bridge risk. Joins every engagement from the discovery sprint.

Smart contract engineer

Implements, tests and deploys Solidity or Rust programs. Minimum two senior engineers per contract module; each contract is peer-reviewed before audit submission.

Security and audit lead

Runs internal threat modelling, static analysis (Slither and Echidna), coordinates third-party audit submission and owns remediation. Present on all engagements above EUR 80,000.

Game economy designer

Builds the sink-and-faucet model, simulates inflation scenarios and co-designs the asset taxonomy with the studio's game designer. Unique to gaming-specialist blockchain development.

Integration engineer

Handles the game backend connection: REST and WebSocket APIs, event indexing pipelines, wallet SDK integration and gasless relayer tuning.

Blockchain QA and DevOps

Manages CI/CD pipelines, testnet environments, load simulation at 10x peak TPS and post-launch monitoring dashboards. 99.95% uptime is an operational discipline, not luck.

Engagement manager

Owns the studio relationship, weekly progress reporting, scope change tracking and live-ops escalation. Single named point of contact from kickoff through sustain.

What you receive

Every fixed-scope engagement closes with a complete handover package. Studios take full ownership of all code, documentation and keys. No proprietary tooling lock-in.

Audited, source-verified smart contracts

All contracts verified on-chain via the chain's block explorer. Third-party audit report included. Remediation of all findings documented.

Deployment runbook and upgrade playbook

Step-by-step mainnet deployment instructions, upgrade procedure for each proxy contract and an emergency pause runbook. Your team can operate independently from day one.

Smart contract threat model

A documented threat model covering reentrancy, oracle risk, bridge risk, access-control escalation and economic attack vectors specific to your game's asset structure.

REST and WebSocket API documentation

Full OpenAPI specification for all backend endpoints: minting, transfers, marketplace listings, event feeds and wallet status. Postman collection included.

Front-end SDK and integration guide

TypeScript SDK for wallet connection, asset display, gasless transaction signing and marketplace interaction. Documented for your game engine team.

Economy health dashboard

Read-only Grafana dashboard connected to your on-chain event indexer. Tracks supply, circulation, secondary-market velocity and sink efficiency. Ownership transferred to the studio.

Knowledge transfer and codebase walkthrough

Three structured sessions with your engineering team: architecture review, contract walkthrough and live-ops procedures. Recordings provided. No black-box handover.

Guarantees and risk-reversal

Choosing a Blockchain Development Company for a live game is a high-stakes decision. These are the contractual and operational commitments Blockchain Monster puts in writing on every engagement.

Free scoping sprint

Every engagement begins with a 2-day discovery sprint at no charge. You receive a scope document, chain recommendation and either a fixed-price proposal or T+M estimate before committing a single euro.

Fixed-price discovery

Fixed-scope builds are priced as firm fixed-fee contracts with milestone-gated payments. Scope creep is managed through a written change-order process. The original budget does not inflate silently.

Client owns all IP and source code

You own 100% of the intellectual property from day one. All contracts, SDKs, documentation and deployment tooling are transferred to you at handover. Blockchain Monster retains no licence rights, no revenue share and no ongoing dependencies.

Audit-pass commitment

We commit to remediating all critical, high and medium findings from the third-party audit before mainnet deployment at no additional cost. If a finding is introduced by our code and missed in internal review, remediation is on us.

No vendor lock-in

We do not use proprietary frameworks, hosted databases or Blockchain Monster-controlled infrastructure after handover. Your contracts live on the public chain; your API runs on your cloud. You can operate, upgrade or migrate independently.

Defined exit and handover procedure

Regardless of how the engagement ends, you receive three knowledge-transfer sessions, all repository access, all deployment keys and a written handover checklist. Sustain retainers carry a 30-day cancellation window.

Your first two weeks

Day 1-2: Free discovery call and initial economy audit. Scope document drafted.
Day 3-5: Fixed-price proposal or T+M estimate delivered. Contracts signed if studio proceeds.
Week 2: Economy design workshop begins. Named pod assigned. Shared repository and project board live.

Founder

Diego Navarro
Founder and Chief Technology Officer
MSc Computer Science and Game Technology, Universitat Politecnica de Catalunya (UPC), 2010

Diego began his career as an engine programmer at a mobile games studio then served as backend lead for a live-ops game platform before founding Blockchain Monster in 2011. His research specialisation covers game economies, real-time systems, on-chain asset interoperability and anti-fraud mechanism design.

In 2018, a mobile game I was consulting on lost rare player items to a server rollback and a duplication exploit. Players had earned those items legitimately, but they did not truly own them. That incident prompted me to rebuild the whole economy around player-owned on-chain assets. "If a player earns it, they own it" became rule one of every project we take on.
↪ LinkedIn profile

Research note

Research Note BMON-2026-08 · February 2026

Player-Owned Economies: On-Chain Asset Interoperability and Anti-Duplication in Live Games

An analysis of 44 game economies from 2021 to 2025, examining item loss causes, duplication exploit rates and secondary-market liquidity under server-owned and on-chain asset models. The study compares scalable blockchain development approaches to legacy server architectures across mobile and PC game genres.

67% of item-related losses across server-owned games came from server-side duplication and rollbacks
Duplication rate fell to zero across all games after migrating to on-chain asset records
Secondary-market liquidity rose 3.1 times within 12 months of on-chain migration across 11 comparable titles
28
pages
Request PDF

What our clients say

Verified feedback from game studio leads who have shipped on-chain economies with Blockchain Monster.

★★★★★
Since migrating to on-chain items with Blockchain Monster, player retention rose 34% and our secondary market hit EUR 12 million in year one. Players trust the economy now.
Laura Vidal
CTO, Pixel Forge Studios
★★★★★
After moving to on-chain assets, duplication exploits dropped to zero. We minted 2.1 million items across three titles without a single fraud incident.
Henrik Aalto
Studio Director, Nornir Games
★★★★★
We onboarded 900,000 players with zero visible crypto friction, and 180 million gasless transactions later the servers have not missed a beat.
Sergio Ferrer
Lead Engineer, Vega Interactive
★★★★★
Interoperable items across our catalogue turned a seasonal spike into a permanent engagement driver. Players now collect across titles.
Mei Tanaka
Head of Live Ops, Lumen Games
★★★★★
The economy design workshops alone were worth the engagement. Blockchain Monster designed sinks and faucets that kept inflation flat for 18 months while secondary-market volume grew.
Tomas Novak
VP Engineering, Arcadia Worlds

Certifications and awards

ISO/IEC 27001:2022

Certificate BMON-IS-2026-0612, issued by AENOR. Valid through 2029-06-15. Covers all production engineering and data handling processes.

SOC 2 Type II

Report BMON-SOC-2026-H1, audited by Sensiba. Covers security, availability and confidentiality trust service criteria.

Clutch Top Blockchain Developers 2026

4.9 out of 5 from 36 verified client reviews. Recognised in the blockchain development category for gaming and FinTech.

G2 High Performer Winter 2026

4.8 out of 5 from 19 verified G2 reviews. High Performer badge in the blockchain development software category.

Barcelona Games World Innovation Award 2025

Awarded for the gasless transaction relayer architecture enabling mass-market onboarding without crypto literacy requirements.

Gamescom Indie Tech Finalist 2025

Selected as a Gamescom Indie Tech finalist for the cross-title item interoperability registry deployed across the Nornir Games catalogue.

Where our engineers publish and speak

Blockchain Monster engineers contribute original technical content on blockchain gaming, player-owned economies and anti-fraud architecture.

GameFi Weekly
Player Owned
The Asset Layer
On-Chain Play
Studio Rails

How to choose a blockchain development company for gaming

Six criteria that separate a specialist gaming blockchain partner from a generalist smart-contract shop. Ask every candidate these questions before signing.

Ask: "Have you shipped a live game economy on this chain?"

A Blockchain Development Company should have verifiable mainnet deployments on the exact chain you are targeting. Ask for the contract addresses and check on-chain activity yourself. Live game economies have different failure modes than DeFi protocols; domain experience on gaming-native chains (Ronin, Immutable zkEVM) is not interchangeable with general EVM work.

Ask: "How do you prevent item duplication exploits?"

Server-side rollbacks and API race conditions caused the majority of item losses in legacy games. A specialist answer covers on-chain provenance, atomic transfer semantics and why a blockchain record is structurally different from a database row. A generic answer ("we audit our code") reveals a generalist mindset.

Ask: "What is your gasless transaction architecture?"

Most players will never own cryptocurrency. A production-ready gasless stack (ERC-4337 account abstraction or EIP-2771 meta-transactions) is a prerequisite for mainstream onboarding. Confirm the relayer has been load-tested at your expected peak transaction volume. Blockchain Monster has processed 1.3 billion gasless in-game transactions in production.

Ask: "Show me your third-party audit results."

Any serious blockchain development company can share audit reports under NDA. Look for: (a) the auditor's name and reputation; (b) the findings severity breakdown; (c) evidence that all critical and high findings were remediated before mainnet. A zero-critical-findings record across many productions is the gold standard, not an absence of audits.

Ask: "Who specifically will work on my project?"

Named engineers with verifiable blockchain gaming experience should be identified before contract signature. Shops that cannot name their team are likely to staff your project with juniors or subcontractors. For a Blockchain Development Company serving gaming studios, the depth of game-economy and live-ops experience on the team is as important as Solidity proficiency.

Ask: "What happens to my IP and keys at handover?"

You should own 100% of the intellectual property, all repository access and all deployment keys from day one. Any arrangement where the vendor retains keys, hosting or licence rights creates a future dependency risk. Verify the exit procedure, the handover documentation and whether you can operate independently after the engagement closes.

Frequently asked questions

What does a blockchain development company do?

A blockchain development company designs and builds software that runs on decentralised networks: smart contracts, tokenised assets, wallets, marketplaces and on-chain infrastructure. Core disciplines span blockchain software development, Web3 integration and decentralized application development. For gaming specifically, this means creating player-owned item systems, gasless transaction relayers, cross-title interoperability layers and economy design frameworks that replace fragile server-side item storage with tamper-proof on-chain records.

How much does it cost to hire a blockchain development company?

Costs depend heavily on scope. At Blockchain Monster, game economy design and build starts from EUR 55,000 for focused engagements. A full on-chain game backend typically ranges from EUR 110,000 to EUR 340,000 depending on chain count, wallet abstraction complexity and live-ops tooling. A marketplace and interoperability layer starts from EUR 300,000. Time-and-materials work is priced at EUR 1,480 per engineer day and ongoing live-ops sustain retainers start from EUR 14,000 per month.

How do I choose a blockchain development company?

Look for domain depth, not just general blockchain experience. For gaming, a specialist who has shipped live game economies, designed anti-duplication provenance systems and built gasless relayers is far more valuable than a generalist smart-contract shop. Evaluate the team's smart contract security posture: do they practice oracle risk management, bridge risk management and transaction safety as standard? Check verifiable metrics: assets minted, secondary-market volume supported, critical findings from third-party audits and uptime records.

Does Blockchain Monster work only on Ethereum?

No. Blockchain Monster supports eight chains: Ethereum, Polygon PoS, Base, Arbitrum Nova, Immutable zkEVM, Ronin, Avalanche C-Chain and Solana. Chain selection is driven by the studio's player geography, transaction volume and gas cost budget. We have shipped production systems on all eight and advise on chain selection as part of every engagement.

What are gasless transactions in blockchain gaming?

Gasless transactions let players interact with on-chain items without needing to hold or spend cryptocurrency for network fees. A meta-transaction relayer operated by the studio or a third-party provider signs and pays the on-chain fee on the player's behalf. The player signs a message with their wallet but never sees a gas prompt. Blockchain Monster has processed over 1.3 billion gasless in-game transactions in production.

How long does it take to build an on-chain game economy?

A focused game economy design and build - covering secure smart contract development, minting pipeline and a basic marketplace - typically takes 10 to 18 weeks from kickoff to mainnet launch. Full cycle blockchain development including wallet abstraction, gasless relay and live-ops tooling runs 20 to 36 weeks. Timeline depends on existing studio infrastructure, number of asset types and chain count. Live-ops sustain begins immediately after launch.

Can players use their items in other games?

Yes, when studios agree on a shared interoperability standard. Blockchain Monster builds cross-title asset registries that let items minted in one game be recognised and equipped in another title within the same studio catalogue or partner ecosystem. Nornir Games used this to let players carry items across three titles, resulting in 2.1 million interoperable assets minted with zero duplication exploits.

How does Blockchain Monster prevent item duplication exploits?

On-chain provenance makes duplication structurally impossible: each token ID is unique on the ledger and ownership transfers atomically. Server-side rollbacks that used to duplicate items cannot affect on-chain records. Our research across 44 game economies found that 67% of item-related losses came from server-side duplication and rollbacks; after migrating to on-chain assets the duplication rate across all client games fell to zero.

What is the minimum engagement to get started?

The smallest fixed-scope engagement is a game economy design and build at EUR 55,000. This covers on chain architecture, smart contract implementation for a single asset class, token systems for gaming, minting pipeline and a basic storefront. Studios with a tighter initial budget can also start with a time-and-materials discovery sprint at EUR 1,480 per engineer day to scope the full project before committing to a fixed contract.

What makes Blockchain Monster different from a generalist blockchain development company?

Blockchain Monster was founded by game engineers who experienced item-loss failures first-hand before blockchain existed as a solution. That origin shapes the entire practice: economy design is treated as an engineering discipline, gasless onboarding is a baseline requirement, and duplication exploit prevention is architecturally enforced rather than patched after the fact. A generalist blockchain development company typically starts from DeFi or enterprise patterns and adapts them to gaming. We started from live-game production problems and built the infrastructure to solve them. The result is 58 shipped games, 1.3 billion gasless transactions processed and zero critical audit findings.

What should I audit before hiring a blockchain development company?

Ask for verifiable mainnet contract addresses on the target chain and check their on-chain activity. Request third-party audit reports (available under NDA from reputable firms). Confirm the named engineers assigned to your project have shipped live game economies, not just prototypes. Verify the engagement terms cover IP ownership, key handover and exit procedures. For gaming specifically, ask whether the candidate has production experience with gasless transaction relayers at your expected transaction volume and with anti-duplication provenance systems. Checking the team's ISO 27001 and SOC 2 status is standard for any engagement handling player wallet data.

How does AI fit into blockchain game development in 2026?

The most practical AI applications in blockchain gaming today are: ML-driven economy health monitoring (flagging inflation or drain anomalies in real time), AI-assisted smart contract static analysis in CI/CD pipelines, autonomous on-chain agents that hold wallets and participate in the economy for seeding and stress-testing, and procedural AI asset generation where the generation parameters are recorded on-chain for verifiable provenance. Blockchain Monster deploys all four on current engagements. The common thread is that AI improves the reliability and depth of the on-chain system; it does not replace the need for audited, formally verified smart contracts.

Blockchain gaming glossary

Blockchain gaming terms explained
Player-Owned Asset
An in-game item recorded on a public blockchain such that the player controls the private key and no central server can revoke or duplicate it.
In-Game Economy
The system of supply, demand, earning and spending inside a game, including currencies, items and their exchange rates. Sound tokenomics implementation and on chain analytics are prerequisites for a healthy in-game economy.
Item Interoperability
The ability for a player-owned asset minted in one game to be recognised and used in a different game or application within the same ecosystem. Achieved through cross chain integration and shared NFT smart contracts.
Gasless Transaction
An on-chain transaction in which the game studio or relayer pays the network fee on behalf of the player, removing friction for players unfamiliar with cryptocurrency.
Mint
The action of creating and registering a new on-chain asset, assigning it a unique token ID and initial ownership to a player wallet.
Secondary Market
A marketplace where players trade previously minted assets with other players, setting prices through supply and demand rather than studio pricing.
Sink and Faucet
An economy design model where faucets (sources) introduce new assets or currency and sinks (drains) remove them, maintaining long-term price stability. A core practice in Web3 development for gaming and blockchain development for gaming.
Provenance
The on-chain record of an asset's origin, ownership history and transfer events, making duplication or counterfeiting detectable and impossible. Provenance is enforced at the smart contract layer through blockchain data indexing and event indexing.
Live Ops
Ongoing operations management for a live game: events, balance patches, contract upgrades and monitoring after initial launch.
Soulbound Item
An on-chain asset that is permanently bound to one wallet address and cannot be transferred or traded, used for achievements and reputation tokens.

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