Assetto Corsa Is Obsolete V1163 Is Required Fix Extra Quality [2026]

Stop. That error isn't an insult. It’s a . And fixing it requires understanding one of the most fascinating civil wars in sim racing history.

If the above fails, your actual game executable might be corrupted. Right-click Assetto Corsa in Steam > Properties Installed Files Verify integrity of game files AC version mismatch

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But thanks to and Pure (the lighting mod), Assetto Corsa on v1.163 with Extra Quality settings looks and feels better than many 2024 sims. The "obsolete" tag only applies to the vanilla executable. Once you fix the version mismatch, AC becomes a next-gen sim: AC becomes a next-gen sim: