Playmint

Playmint is a UK-based onchain gaming studio focused on building fully onchain games, autonomous worlds, and supporting developer technology for decentralized game ecosystems. Its work includes The Crypt, described by Cartridge as the first fully onchain co-op multiplayer game, and Downstream, an autonomous world / UGC platform where players could permissionlessly extend the game itself; Playmint also developed Playerchains, a peer-to-peer consensus architecture for real-time multiplayer without centralized servers. In short: Playmint is a pioneer in fully onchain games and autonomous worlds, building both experimental game IP and the underlying infrastructure for persistent, player-owned, composable game worlds; Cartridge acquired the company in January 2026.