Butterscotch is an open source re-implementation of GameMaker: Studio's runner.
Generate a PlayStation 2 ISO for a GameMaker: Studio 1.4.1804 game! (for now it is tailored for Undertale v1.08, screen resizing and input mapping coming soon™)
Butterscotch Project URL: https://github.com/MrPowerGamerBR/Butterscotch