Undertale, Made With GameMaker

Welcome to UNDERTALE - the friendly RPG where no-one has to die, developed by Toby Fox in the GameMaker engine. Experience the indie legend for yourself.

Which game engine should you use? - by Michael Doyle

Undertale coming to Switch brings indie games' GameMaker Studio engine with it - Polygon

How Undertale Made Millions With No Marketing Budget - Daniel Parente Blog

HanifAnims' Showcase Content

Undertale Engine by TML233 - Game Jolt

Undertale Engine by jevilhumor

Game Engine GameMaker Develops UGC mod.io Extension

Steam] Made with GameMaker Sale, Undertale 50%, Wuppo 60%

UndertaleModTool [UNDERTALE] [Modding Tools]

Undertale, Made With GameMaker

Why We Love GameMaker Studio

Undertale - Wikipedia

GameMaker Studio 2 Signs Deal With Nintendo Switch - Siliconera

How to create an Undertale Fangame #1 [ TuToriel ]