YYToolkit is a tool for creating mods and altering GameMaker games, supported on Windows 8.1 → Windows 11.
- 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
- Help with YYToolkit or Aurie Framework - Arch Wizards Server
- General game modding questions - Underminers Server
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 | ❌ | 🟠 |
- 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.