Butterscotch

Butterscotch is an open-source re-implementation of the GameMaker: Studio runner, enabling the execution of GameMaker games compiled to bytecode on various platforms. It primarily aims to support a wide range of GameMaker: Studio games, especially targeting titles like Undertale, by allowing compatibility with multiple WAD versions. Notable features include a focus on community collaboration, ongoing development for increased game support, and the ability to generate PlayStation 2 ISO files.