Introduction

Cryptonauts is a UE5 multiplayer GameFi Experience built on UE5 and powered by Stacks, a Bitcoin-anchored smart contract layer. This documentation details how we integrated Stacks wallet authentication, NFT verification, and on-chain asset logic directly into Unreal Engine, enabling features such as player skin ownership validation, Codex Component loadouts (NFT-based abilities), and signed game session data for Web3 interoperability. The goal of this documentation is to help other Unreal developers understand how to bridge traditional multiplayer systems with verifiable on-chain data, using the Stacks blockchain.