YYToolkit
YYToolkit is a tool for creating mods and altering GameMaker games, supported on Windows 8.1 → Windows 11.
Features
- Plugin Support
- Run custom code in the game's context via a robust callback system
- Detour game functions to your plugin to implement custom functionality
- Well-documented
- The wiki has most API functions documented for both YYTK Legacy and YYTK Next
- Full access to GameMaker functions, scripts, and variables
- Full compatibility with existing tools like UndertaleModTool or Dogscepter
- Runtime loading / unloading
- Mods can be managed seamlessly while the game is running
Getting help
YYTK Editions
YYTK is split on two branches, that being Legacy and Stable (Next).
[!NOTE]
❌ = Unsupported
🟠 = Limited support
🟡 = Supported, unreliable
✅ = Supported
| Point of comparison |
YYToolkit Legacy |
YYToolkit Next |
| GM 1.4.x |
🟡 |
❌ |
| GM 2.x.x |
✅ |
🟠 |
| GM 2022.x |
🟠 |
✅ |
| GM 2023.x |
❌ |
✅ |
| GM 2024.x beta |
❌ |
✅ |
| VM runner support |
✅ |
🟡 |
| x86 runner support |
✅ |
🟡 |
| x64 runner support |
🟡 |
✅ |
| Active Development |
❌ |
✅ |
| Accessing global variables |
✅ |
✅ |
| Accessing local variables |
🟠 |
✅ |
| Accessing built-in variables |
❌ |
✅ |
| Accessing data structures |
❌ |
✅ |
| Accessing scripts |
🟡 |
✅ |
| Accessing rooms |
❌ |
✅ |
| Manipulating object events |
❌ |
🟠 |
Contributors
- YYTK Next
- mashirochan for the awesome work on streamlining the installation process
- PippleCultist for reporting bugs
- ramennnoodle for creating how-to guides on getting YYToolkit and Aurie running on Linux
- YYTK Legacy
- MousieDev for creating makefiles (which probably don't work at this point)
- Miepee for the awesome icon!
- TheEternalShine for testing and giving feedback on in-development versions of the tool.