Undertale is a video game by Toby Fox. Released in 2015, The game is about
the player controlling a small child who fell into a pit near mount ebott.
And separated by a magical barrier created by the humans in the past.
You have to go though a journey back to the surface while coming across
monsters. You can opt to spare monsters or kill them. There are many endings
depending on how you play the game
The most complete tool for modding, decompiling and unpacking Undertale (and other GameMaker games!)
🥧 An open source re-implementation of GameMaker: Studio's runner (YoYo Runner), targeting Undertale v1.08 (WAD Version 16)
The best working and fully optimized GML runner in C for the Nintendo 3DS and Wii U.
Independent 1:1 DELTARUNE Engine made in GameMaker Studio
Переклад Undertale українською.
A work-in-progress modding tool geared toward UNDERTALE/DELTARUNE
BadTime Simulator Reimagined (2026) is the premier utility for high-intensity boss fight simulation. Master your skills and precision with this secure, high-speed, and optimized combat experience.
Static site for viewing Undertale/Deltarune game scripts made so we have a site to reference when citing code on Undertale/Deltarune Wiki (original by xkeeper).
Undertale theme for GNU GRUB.
👻 Simple Undertale-like game on Basys3 FPGA written in Verilog
Underune maker is a map maker for Undertale and Deltarune. It contains all the assets, and you can make and customize as many rooms as you want.
A GameMaker-compatible mod manager
Created by Toby Fox
Released September 2015