The Evaluation Framework

Before diving into each SDK, here is what we are measuring:

• •Engine support: Unity and Unreal integration depth
• •Wallet and onboarding UX: How invisible is the blockchain to players?
• •Gasless transactions: Who pays gas, and how?
• •Marketplace and NFT tooling: Built-in trading, minting, metadata
• •Chain support: Single-chain vs. multi-chain flexibility
• •Pricing: Free tiers, transaction fees, enterprise costs
• •Case studies: Who is actually shipping with this SDK?

Immutable: The Gaming-Native Chain and SDK

Best for: AAA and mid-core studios committed to a purpose-built gaming chain with zero gas fees.

Immutable has evolved from an NFT-focused Layer 2 into a full-stack gaming platform anchored by Immutable zkEVM, a zero-knowledge rollup built in partnership with Polygon. The SDK is designed around one premise: blockchain should be completely invisible to players.

Architecture and Key Features

The Immutable Passport is the centerpiece — a non-custodial wallet that doubles as a gamer identity system. Players sign up with email or social login, and the wallet is created automatically in the background. No seed phrases, no MetaMask popups, no chain-switching dialogs. Studios integrate Passport through the SDK, and every subsequent transaction is signed without explicit wallet interaction.

The Immutable Orderbook is a global, shared order book for NFT trading across all games on the platform. This means liquidity is pooled — an item listed in Game A is discoverable and purchasable from Game B or the Immutable marketplace. For studios, this eliminates the need to build marketplace infrastructure.

All transactions on Immutable zkEVM are gas-free for end users. The protocol absorbs gas costs and recovers them through a 2% protocol fee on marketplace trades. This is not meta-transaction wrapping or paymaster sponsorship — it is a chain-level design decision.

Engine Support

Immutable offers a Unity SDK with deep integration for Passport authentication, NFT minting, marketplace listing, and inventory management. The Unreal Engine plugin launched in late 2025, covering Passport login and core marketplace operations, though it trails the Unity SDK in feature parity.

Pricing

No SDK licensing fees. Zero gas for users. The 2% marketplace protocol fee is the primary revenue mechanism. Custom enterprise deals are available for studios exceeding $10M monthly trading volume.

Case Studies

Gods Unchained (trading card game, 500K+ monthly active wallets) and Guild of Guardians (mobile RPG) are flagship titles. Over 250 games are building on Immutable zkEVM as of Q1 2026, with Illuvium and Metalcore among the highest-profile upcoming launches.

Sequence: Embedded Wallets and Instant Onboarding

Best for: Studios prioritizing the fastest possible player onboarding with zero Web3 friction.

Sequence, built by Horizon, approaches blockchain gaming from a wallet-infrastructure perspective. Its core innovation is the embedded wallet — a smart contract wallet created instantly for every player without requiring any blockchain knowledge whatsoever.

Architecture and Key Features

Sequence wallets are smart contract wallets (not EOAs), which means they support transaction batching, session keys, and gas sponsorship natively. When a player logs into a Sequence-powered game with Google or Apple credentials, a wallet is deployed automatically. The player never sees a wallet address unless they choose to.

The Sequence Marketplace API allows studios to spin up white-label NFT marketplaces with custom fees, royalty enforcement, and cross-game item discovery. The Sequence Indexer provides real-time on-chain data without studios needing to run their own indexing infrastructure.

Gas sponsorship is handled through the Sequence Relayer, which batches and sponsors transactions. Studios deposit funds into a sponsorship pool and set rules (e.g., sponsor up to 100 transactions per user per day).

Engine Support

Sequence provides SDKs for Unity, Unreal Engine, and web (TypeScript/React). The Unity SDK includes prefab UI components for wallet connection, inventory display, and transaction signing. The Unreal plugin focuses on embedded wallet creation and transaction relay.

Pricing

Embedded wallets are free. The Marketplace API charges a per-transaction fee (typically 1-2.5% configurable by the studio). Indexer and Relayer services have free tiers with usage-based scaling.

Case Studies

Skyweaver (digital TCG by Horizon) was built on Sequence from the ground up. Parallel TCG and several mid-tier mobile games use Sequence for wallet infrastructure. The SDK powers onboarding for several games exceeding 100K monthly players.

Thirdweb: Multi-Chain Flexibility and Contract Modularity

Best for: Studios that need multi-chain deployment, maximum smart contract customization, and chain-agnostic architecture.

Thirdweb is not a gaming-specific SDK — it is a general-purpose Web3 development platform that has become a top choice for game studios because of its breadth. With 2,000+ audited, deployable smart contracts and support for 20+ EVM chains, it offers the widest optionality in the market.

Architecture and Key Features

Thirdweb's approach is modular. Studios pick and compose contracts — ERC-721 for unique items, ERC-1155 for fungible resources, marketplace contracts, staking contracts, token drops — and deploy them to any supported chain. The Contract SDK provides type-safe interactions with these contracts from Unity, Unreal, React, or server-side Node.js.

Account abstraction (ERC-4337) is built into the platform. Studios can deploy smart wallets with paymaster contracts that sponsor gas, enable session keys for background transactions, and batch multiple operations into single user-facing actions. This is not chain-native gaslessness like Immutable — it is standard-based abstraction that works on any EVM chain.

The thirdweb Engine is a self-hostable backend server that manages wallets, handles transaction queuing, and provides REST APIs for on-chain operations. This is particularly valuable for studios with existing backend infrastructure.

Engine Support

The Unity SDK is mature, with prebuilt UI components for wallet connection (MetaMask, Coinbase Wallet, smart wallets), NFT rendering, and marketplace interaction. The Unreal SDK supports C++ integration with contract reads, writes, and wallet operations. Both engines support gasless transactions through the account abstraction layer.

Pricing

Free tier includes up to a threshold of monthly active wallets and transactions. Growth plans start at $99/month. Enterprise custom pricing. No per-transaction protocol fees on smart contracts you deploy.

Case Studies

Thirdweb powers NFT and token infrastructure for hundreds of projects. In gaming specifically, several Polygon-based titles and Base-chain games use Thirdweb contracts. Its flexibility makes it popular with studios building across multiple chains simultaneously.

Moralis: Backend-First Web3 for Server-Side Studios

Best for: Studios with strong backend engineering teams that want Web3 data and auth without frontend SDK lock-in.

Moralis positions itself as the "Firebase of Web3" — a backend platform that gives studios real-time blockchain data, authentication, and event streaming through REST APIs and webhooks rather than client-side SDKs.

Architecture and Key Features

The Moralis Streams API lets studios subscribe to on-chain events (transfers, mints, contract calls) and receive them as webhooks to their own servers. Instead of polling RPC nodes or running indexers, studios pipe blockchain events directly into their existing game servers.

Moralis Auth provides wallet-based authentication that integrates with existing session management (NextAuth, Passport.js, custom JWT). This is useful for studios that already have authentication infrastructure and want to add "Sign in with Ethereum" or "Sign in with Phantom" without rebuilding their auth stack.

The NFT API and Token API provide enriched on-chain data — ownership, metadata, transfer history, price estimates — through simple REST calls. Studios query player inventories, verify ownership, and render NFT metadata without touching a blockchain node.

Engine Support

Moralis does not provide native Unity or Unreal plugins. Integration is through REST APIs called from any HTTP client, making it engine-agnostic but requiring more integration work. Studios typically wrap Moralis APIs in their existing game server layer and communicate with the game client through their standard networking stack.

Pricing

Free tier: 25,000 compute units per month. Pro plans start at $49/month. Enterprise plans offer dedicated infrastructure and SLAs. Compute units are consumed per API call, with complex queries costing more units.

Case Studies

Moralis powers backend infrastructure for numerous dApps and several blockchain games, particularly those with existing server architectures that needed to add Web3 capabilities incrementally rather than adopt a full-stack gaming SDK.

Alchemy: NFT APIs and Account Abstraction at Scale

Best for: Studios needing rock-solid infrastructure, comprehensive NFT APIs, and enterprise-grade account abstraction.

Alchemy is the largest blockchain infrastructure provider, powering billions of requests daily. Its gaming play combines battle-tested NFT APIs, account abstraction (ERC-4337) tooling, and the reliability that comes from operating at massive scale.

Architecture and Key Features

The Alchemy NFT API is arguably the most comprehensive in the market — ownership lookup, metadata resolution (with IPFS gateway), collection stats, floor prices, rarity scores, and spam detection. For gaming studios, this means reliable inventory queries across 30+ supported chains.

Alchemy Account Kit provides a full account abstraction stack: smart account deployment, paymaster integration for gas sponsorship, session keys, and transaction batching. Studios can create invisible wallets for players, sponsor all gas costs, and let players perform complex multi-step operations (craft item + list on marketplace) in a single click.

Alchemy Webhooks and Custom Webhooks deliver real-time on-chain event notifications, similar to Moralis Streams but with Alchemy's infrastructure scale behind them.

Engine Support

Alchemy provides TypeScript/JavaScript SDKs and REST APIs. There are no official Unity or Unreal plugins — integration follows the same HTTP-based pattern as Moralis. Community-maintained wrappers exist for Unity but are not officially supported.

Pricing

Generous free tier: 300 million compute units per month. Growth plans at $49/month and scale plans at $199/month. Account Kit has its own pricing based on active smart accounts. For most indie and mid-tier studios, the free tier is sufficient through early development and soft launch.

Case Studies

Alchemy infrastructure supports thousands of dApps including major gaming projects. Its NFT API is used by OpenSea, Rarible, and numerous gaming marketplaces. Account Kit adoption is growing rapidly among studios building on Base and Arbitrum.

Head-to-Head Comparison Table

How to Choose: A Decision Framework

Choose Immutable if you are building a game that benefits from shared liquidity, zero gas fees, and a dedicated gaming ecosystem. You accept chain lock-in to Immutable zkEVM in exchange for a purpose-built, gas-free gaming experience with Passport wallet onboarding.

Choose Sequence if player onboarding speed is your top priority. Embedded wallets with social login and instant creation mean the lowest possible drop-off from "click play" to "in the game." Ideal for mobile and casual titles where any wallet friction means player loss.

Choose Thirdweb if you need multi-chain flexibility or extensive smart contract customization. Deploy the same contracts on Polygon today, Base tomorrow, and Arbitrum next month. The modular architecture suits studios with complex tokenomics or custom marketplace mechanics.

Choose Moralis if your team is backend-heavy and you want to add Web3 capabilities to an existing game server without adopting a client-side SDK. Best for incremental Web3 adoption where blockchain is a feature, not the foundation.

Choose Alchemy if you need enterprise-grade infrastructure reliability, the most comprehensive NFT APIs, and standards-based account abstraction. Alchemy is the safe choice for studios that need to scale to millions of players on established infrastructure.

The Convergence Trend

These platforms are converging. Immutable is adding multi-chain support. Sequence is expanding its marketplace. Thirdweb is deepening gaming-specific features. Moralis and Alchemy are both investing in account abstraction. By late 2026, the differences will narrow further.

The most pragmatic approach for studios starting today: choose based on your primary constraint. If it is chain ecosystem and zero gas, go Immutable. If it is onboarding UX, go Sequence. If it is chain flexibility, go Thirdweb. If it is backend integration, go Moralis or Alchemy.

The blockchain gaming SDK you select is not a permanent marriage — but it is a 12-18 month commitment that shapes your architecture. Choose deliberately, prototype quickly, and validate with real players before scaling.

The Evaluation Framework

Before diving into each SDK, here is what we are measuring:

• •Engine support: Unity and Unreal integration depth
• •Wallet and onboarding UX: How invisible is the blockchain to players?
• •Gasless transactions: Who pays gas, and how?
• •Marketplace and NFT tooling: Built-in trading, minting, metadata
• •Chain support: Single-chain vs. multi-chain flexibility
• •Pricing: Free tiers, transaction fees, enterprise costs
• •Case studies: Who is actually shipping with this SDK?

Immutable: The Gaming-Native Chain and SDK

Best for: AAA and mid-core studios committed to a purpose-built gaming chain with zero gas fees.

Immutable has evolved from an NFT-focused Layer 2 into a full-stack gaming platform anchored by Immutable zkEVM, a zero-knowledge rollup built in partnership with Polygon. The SDK is designed around one premise: blockchain should be completely invisible to players.

Architecture and Key Features

The Immutable Passport is the centerpiece — a non-custodial wallet that doubles as a gamer identity system. Players sign up with email or social login, and the wallet is created automatically in the background. No seed phrases, no MetaMask popups, no chain-switching dialogs. Studios integrate Passport through the SDK, and every subsequent transaction is signed without explicit wallet interaction.

The Immutable Orderbook is a global, shared order book for NFT trading across all games on the platform. This means liquidity is pooled — an item listed in Game A is discoverable and purchasable from Game B or the Immutable marketplace. For studios, this eliminates the need to build marketplace infrastructure.

All transactions on Immutable zkEVM are gas-free for end users. The protocol absorbs gas costs and recovers them through a 2% protocol fee on marketplace trades. This is not meta-transaction wrapping or paymaster sponsorship — it is a chain-level design decision.

Engine Support

Immutable offers a Unity SDK with deep integration for Passport authentication, NFT minting, marketplace listing, and inventory management. The Unreal Engine plugin launched in late 2025, covering Passport login and core marketplace operations, though it trails the Unity SDK in feature parity.

Pricing

No SDK licensing fees. Zero gas for users. The 2% marketplace protocol fee is the primary revenue mechanism. Custom enterprise deals are available for studios exceeding $10M monthly trading volume.

Case Studies

Gods Unchained (trading card game, 500K+ monthly active wallets) and Guild of Guardians (mobile RPG) are flagship titles. Over 250 games are building on Immutable zkEVM as of Q1 2026, with Illuvium and Metalcore among the highest-profile upcoming launches.

Sequence: Embedded Wallets and Instant Onboarding

Best for: Studios prioritizing the fastest possible player onboarding with zero Web3 friction.

Sequence, built by Horizon, approaches blockchain gaming from a wallet-infrastructure perspective. Its core innovation is the embedded wallet — a smart contract wallet created instantly for every player without requiring any blockchain knowledge whatsoever.

Architecture and Key Features

Sequence wallets are smart contract wallets (not EOAs), which means they support transaction batching, session keys, and gas sponsorship natively. When a player logs into a Sequence-powered game with Google or Apple credentials, a wallet is deployed automatically. The player never sees a wallet address unless they choose to.

The Sequence Marketplace API allows studios to spin up white-label NFT marketplaces with custom fees, royalty enforcement, and cross-game item discovery. The Sequence Indexer provides real-time on-chain data without studios needing to run their own indexing infrastructure.

Gas sponsorship is handled through the Sequence Relayer, which batches and sponsors transactions. Studios deposit funds into a sponsorship pool and set rules (e.g., sponsor up to 100 transactions per user per day).

Engine Support

Sequence provides SDKs for Unity, Unreal Engine, and web (TypeScript/React). The Unity SDK includes prefab UI components for wallet connection, inventory display, and transaction signing. The Unreal plugin focuses on embedded wallet creation and transaction relay.

Pricing

Embedded wallets are free. The Marketplace API charges a per-transaction fee (typically 1-2.5% configurable by the studio). Indexer and Relayer services have free tiers with usage-based scaling.

Case Studies

Skyweaver (digital TCG by Horizon) was built on Sequence from the ground up. Parallel TCG and several mid-tier mobile games use Sequence for wallet infrastructure. The SDK powers onboarding for several games exceeding 100K monthly players.

Thirdweb: Multi-Chain Flexibility and Contract Modularity

Best for: Studios that need multi-chain deployment, maximum smart contract customization, and chain-agnostic architecture.

Thirdweb is not a gaming-specific SDK — it is a general-purpose Web3 development platform that has become a top choice for game studios because of its breadth. With 2,000+ audited, deployable smart contracts and support for 20+ EVM chains, it offers the widest optionality in the market.

Architecture and Key Features

Thirdweb's approach is modular. Studios pick and compose contracts — ERC-721 for unique items, ERC-1155 for fungible resources, marketplace contracts, staking contracts, token drops — and deploy them to any supported chain. The Contract SDK provides type-safe interactions with these contracts from Unity, Unreal, React, or server-side Node.js.

Account abstraction (ERC-4337) is built into the platform. Studios can deploy smart wallets with paymaster contracts that sponsor gas, enable session keys for background transactions, and batch multiple operations into single user-facing actions. This is not chain-native gaslessness like Immutable — it is standard-based abstraction that works on any EVM chain.

The thirdweb Engine is a self-hostable backend server that manages wallets, handles transaction queuing, and provides REST APIs for on-chain operations. This is particularly valuable for studios with existing backend infrastructure.

Engine Support

The Unity SDK is mature, with prebuilt UI components for wallet connection (MetaMask, Coinbase Wallet, smart wallets), NFT rendering, and marketplace interaction. The Unreal SDK supports C++ integration with contract reads, writes, and wallet operations. Both engines support gasless transactions through the account abstraction layer.

Pricing

Free tier includes up to a threshold of monthly active wallets and transactions. Growth plans start at $99/month. Enterprise custom pricing. No per-transaction protocol fees on smart contracts you deploy.

Case Studies

Thirdweb powers NFT and token infrastructure for hundreds of projects. In gaming specifically, several Polygon-based titles and Base-chain games use Thirdweb contracts. Its flexibility makes it popular with studios building across multiple chains simultaneously.

Moralis: Backend-First Web3 for Server-Side Studios

Best for: Studios with strong backend engineering teams that want Web3 data and auth without frontend SDK lock-in.

Moralis positions itself as the "Firebase of Web3" — a backend platform that gives studios real-time blockchain data, authentication, and event streaming through REST APIs and webhooks rather than client-side SDKs.

Architecture and Key Features

The Moralis Streams API lets studios subscribe to on-chain events (transfers, mints, contract calls) and receive them as webhooks to their own servers. Instead of polling RPC nodes or running indexers, studios pipe blockchain events directly into their existing game servers.

Moralis Auth provides wallet-based authentication that integrates with existing session management (NextAuth, Passport.js, custom JWT). This is useful for studios that already have authentication infrastructure and want to add "Sign in with Ethereum" or "Sign in with Phantom" without rebuilding their auth stack.

The NFT API and Token API provide enriched on-chain data — ownership, metadata, transfer history, price estimates — through simple REST calls. Studios query player inventories, verify ownership, and render NFT metadata without touching a blockchain node.

Engine Support

Moralis does not provide native Unity or Unreal plugins. Integration is through REST APIs called from any HTTP client, making it engine-agnostic but requiring more integration work. Studios typically wrap Moralis APIs in their existing game server layer and communicate with the game client through their standard networking stack.

Pricing

Free tier: 25,000 compute units per month. Pro plans start at $49/month. Enterprise plans offer dedicated infrastructure and SLAs. Compute units are consumed per API call, with complex queries costing more units.

Case Studies

Moralis powers backend infrastructure for numerous dApps and several blockchain games, particularly those with existing server architectures that needed to add Web3 capabilities incrementally rather than adopt a full-stack gaming SDK.

Alchemy: NFT APIs and Account Abstraction at Scale

Best for: Studios needing rock-solid infrastructure, comprehensive NFT APIs, and enterprise-grade account abstraction.

Alchemy is the largest blockchain infrastructure provider, powering billions of requests daily. Its gaming play combines battle-tested NFT APIs, account abstraction (ERC-4337) tooling, and the reliability that comes from operating at massive scale.

Architecture and Key Features

The Alchemy NFT API is arguably the most comprehensive in the market — ownership lookup, metadata resolution (with IPFS gateway), collection stats, floor prices, rarity scores, and spam detection. For gaming studios, this means reliable inventory queries across 30+ supported chains.

Alchemy Account Kit provides a full account abstraction stack: smart account deployment, paymaster integration for gas sponsorship, session keys, and transaction batching. Studios can create invisible wallets for players, sponsor all gas costs, and let players perform complex multi-step operations (craft item + list on marketplace) in a single click.

Alchemy Webhooks and Custom Webhooks deliver real-time on-chain event notifications, similar to Moralis Streams but with Alchemy's infrastructure scale behind them.

Engine Support

Alchemy provides TypeScript/JavaScript SDKs and REST APIs. There are no official Unity or Unreal plugins — integration follows the same HTTP-based pattern as Moralis. Community-maintained wrappers exist for Unity but are not officially supported.

Pricing

Generous free tier: 300 million compute units per month. Growth plans at $49/month and scale plans at $199/month. Account Kit has its own pricing based on active smart accounts. For most indie and mid-tier studios, the free tier is sufficient through early development and soft launch.

Case Studies

Alchemy infrastructure supports thousands of dApps including major gaming projects. Its NFT API is used by OpenSea, Rarible, and numerous gaming marketplaces. Account Kit adoption is growing rapidly among studios building on Base and Arbitrum.

Head-to-Head Comparison Table

How to Choose: A Decision Framework

Choose Immutable if you are building a game that benefits from shared liquidity, zero gas fees, and a dedicated gaming ecosystem. You accept chain lock-in to Immutable zkEVM in exchange for a purpose-built, gas-free gaming experience with Passport wallet onboarding.

Choose Sequence if player onboarding speed is your top priority. Embedded wallets with social login and instant creation mean the lowest possible drop-off from "click play" to "in the game." Ideal for mobile and casual titles where any wallet friction means player loss.

Choose Thirdweb if you need multi-chain flexibility or extensive smart contract customization. Deploy the same contracts on Polygon today, Base tomorrow, and Arbitrum next month. The modular architecture suits studios with complex tokenomics or custom marketplace mechanics.

Choose Moralis if your team is backend-heavy and you want to add Web3 capabilities to an existing game server without adopting a client-side SDK. Best for incremental Web3 adoption where blockchain is a feature, not the foundation.

Choose Alchemy if you need enterprise-grade infrastructure reliability, the most comprehensive NFT APIs, and standards-based account abstraction. Alchemy is the safe choice for studios that need to scale to millions of players on established infrastructure.

The Convergence Trend

These platforms are converging. Immutable is adding multi-chain support. Sequence is expanding its marketplace. Thirdweb is deepening gaming-specific features. Moralis and Alchemy are both investing in account abstraction. By late 2026, the differences will narrow further.

The most pragmatic approach for studios starting today: choose based on your primary constraint. If it is chain ecosystem and zero gas, go Immutable. If it is onboarding UX, go Sequence. If it is chain flexibility, go Thirdweb. If it is backend integration, go Moralis or Alchemy.

The blockchain gaming SDK you select is not a permanent marriage — but it is a 12-18 month commitment that shapes your architecture. Choose deliberately, prototype quickly, and validate with real players before scaling.