Three originals — Limbo, Crash and Mines — with fairness anyone can audit bet by bet. The three games that define the modern crypto-casino lobby, built on cryptography rather than trust. Limbo and Mines derive results from a per-player seed triple the player commits to in advance; Crash uses a published hash chain consumed backwards, so every future round is fixed the moment the chain tip goes out — rigging it would mean inverting SHA-256. Three complete, tested game engines with verified house edge and distributions Seed rotation and reveal, so players can check past rounds against a hash published earlier Shared multiplayer Crash rounds with a live, verifiable chain Test suites for the maths, the API, abuse cases and the live chain Play-money engine: no payment code in the repo, sells as a licensable platform