The role-playing game Roblox Undertale Last Reset allows users to explore the Undertale universe in a unique way.

Undertale Timeline Reset codes give players free resources when redeemed. This game takes inspiration from the classic Undertale Multiverse Battles and Undertale Multiverse Battles Remastered.

A new Undertale fan game, called Undertale Blue, has been announced by a team of indie devs following the success of the Yellow fan game.