Video games are evolving towards decentralized models thanks to blockchain technology. This technology allows players to own their digital assets and make secure transactions. Unlike traditional games, blockchain-based games offer total transparency and an autonomous economy. Several blockchains specialize in gaming, each presenting unique characteristics. Some prioritize scalability, while others focus on security or low energy consumption. This article analyzes the most used blockchains in gaming, highlighting their specifics, advantages, and the challenges they face. The goal is to understand their impact on the video game industry and its future.