Reverse-engineered Crimsonland gets browser co-op via input-only netplay
banteg · x · 2026-10-18
Developer banteg reverse-engineered the 2003 game Crimsonland from its stripped binary, ported it to WASM, and now added online browser co-op: share a link and two players each run the same game.wasm in lockstep. The original full state is 450 KB with hundreds of on-screen entities, too heavy to stream at 60 Hz—so the port bends the game into a deterministic simulation, syncing only inputs, which also yields lightweight replays and verifiable online leaderboard scores.
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