DETERMINATION

Guides

Short, plain-English guides for modding UNDERTALE on a Mac.

Make an UNDERTALE mod without code

Rewrite dialogue, make anything talk, swap music and test any fight, all by clicking. A walkthrough of Determination Studio.

How to mod UNDERTALE on Mac

The easy way to install UNDERTALE mods on a Mac: no Windows, no Wine, no command line. Takes about a minute.

Use Windows UNDERTALE mods on Mac

Most UNDERTALE mods are patches made for the Windows version. Here is how to run them on a Mac, legally and for free, with your Steam copy.

Make your own UNDERTALE mod

A beginner-friendly look at how UNDERTALE mods work and how to make a simple one that changes the game's text.