UndertaleForFree is an April Fools game which was initially disguised as a web port of Undertale. Upon launch of the website, the game started off like the regular game up until the title card, in which it would break revealing the joke game underneath. The actual game itself is a clone of CrazyBus, which includes enemy encounters from Undertale for the bus to run over.

UndertaleForFree

Nuno Abilio

Eduardo Minholi

Prepare for a relentless challenge in Comic-Sans, a fan-made survival game where every second counts, inspired by an iconic final battle.

Comic-Sans

Underwheels

Spacey_432

Project Spacetime, or PS!Outertale for short, is a take on Outertale by Mimi Pippinski (2mi127). It is set on a space station (the Outpost) which the monsters were banished to after their home planet was destroyed.

PS!Outertale

Undertale: Remembering the GENOCIDES is an Undertale (joke) fangame (and yet another generic sans fangame) that took place of 69,000 genocide routes. Sans remembers you're genocides and decided to stop you early at Snowdin. Fight him to WIN.

Undertale: Remembering the Genocides

Gameplay Video

A free-to-play Undertale-themed card game. Also features Deltarune and Undertale Yellow cards!

Undertale Fangame Browser Games

UndertaleForFree

Comic-Sans

Underwheels

PS!Outertale

Undertale: Remembering the Genocides

Undercards