Best - Gamemaker Studio 2 Decompiler

Several tools claim to decompile GMS2 games, but none produce a perfect, ready-to-compile project folder with original comments, variable names, or folder structure. Notable Tools and Techniques | Tool / Method | Output Quality | Ease of Use | Platform Target | | :--- | :--- | :--- | :--- | | UndertaleModTool | High (modern GMS2) | GUI-based | Windows VM | | Altar.NET | Medium (older versions) | CLI, needs C# knowledge | Windows VM | | QuickBMS scripts | Low (raw asset extraction) | Command line | All versions | | Manual hex editing | Very Low | Expert-level | All | 1. UndertaleModTool (The Industry Standard) Initially created for modding Undertale (which runs on GameMaker: Studio 1.4), this open-source tool has evolved to support GMS2 and GMS2.3+.

Understand that VM compilation is not security. Use YYC, add obfuscation, and focus on what makes your game unique. Legal action is your final recourse, not your first defense. gamemaker studio 2 decompiler

Understand algorithms, fix bugs for a mod, create a level editor. Several tools claim to decompile GMS2 games, but

| Scenario | Ethical? | Legal Risk | | :--- | :--- | :--- | | Decompiling your game (lost source) | Yes | Low (no distribution) | | Decompiling for personal modding (non-commercial) | Gray area | Medium (depends on game dev) | | Decompiling to learn techniques (no redistribution) | Gray area | Medium | | Decompiling and reusing assets/code commercially | No | High (liable for damages) | | Distributing a decompiler tool | Yes (tool itself) | Low (if open-source for education) | Understand that VM compilation is not security