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.
YYToolkit is, and likely always will be, free software.
If you wish to support my efforts of developing YYToolkit and the Aurie Framework, reach out to me on Discord using the @archie_uwu username. I currently only accept donations through international bank transfer.