Among Us 2026.9.29: custom-map Freeplay fails with MissingMethodException #71

What happened?

After updating Among Us to 2026.9.29 (v19), a previously working custom map did not finish entering playable Freeplay. The map remained on an apparent initial view while its animation continued running.

With an x64 BepInEx installation allowing the mod to start, the log contained:

System.MissingMethodException: Method not found: 'AmongUs.GameOptions.NormalGameOptionsV11 LogicOptionsNormal.get_GameOptions()'.
   at LevelImposter.Core.Patches.Fixes.FreeplayOptionsPatch.Postfix()

Expected behavior

The custom map finishes loading and Freeplay is playable.

Versions

• Among Us: 2026.9.29 / v19, Steam x64
• Level Imposter: 1.0.2, originally targeting the 2026.8.18 game assemblies
• BepInEx: 6.0.0-be.753, Unity IL2CPP x64
• Reactor: 2.5.1

Reproduction

1. Use Among Us 2026.9.29 with a matching x64 BepInEx installation and the previous Level Imposter build.
2. Load a custom map in Freeplay.
3. Observe the startup failure and the missing-method error above.

Proposed fix

PR #70 updates the game-assembly target to 2026.9.29 and corrects stale references in DummyPatch so the plugin can be rebuilt. The updated build resolved the observed problem in local testing, and custom maps are working with it.

An x64 BepInEx installation is a separate prerequisite; PR #70 does not update the bundled native loader/runtime. This report does not claim exhaustive multiplayer or all-map compatibility testing.

Proposed fix: #70