Claude Opus rebuilt Terraria in 3D: 346K lines of C# in 8 days, zero hand-written code
Promptmethus · x · 2026-10-07
A developer claims Claude Opus 5.5 rebuilt Terraria in 3D in 8 days: 346K lines of C#, 3,369 items, 313 enemies and bosses, on a custom engine with no Unity or Godot. The most striking part: the creator says they wrote none of the code themselves — an extreme showcase of AI game development.
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