icsharpcode / ILSpy
Cross-platform .NET assembly browser and decompiler that turns compiled assemblies back into readable C#.
icsharpcode / ILSpy
AssetRipper / AssetRipper
GUI application that extracts and converts assets from Unity game files into the native Unity engine format for analysis.
SamboyCoding / Cpp2IL
Work-in-progress tool that reverses Unity's IL2CPP build output back into managed .NET DLLs.