Deltarune features many returning characters from Undertale, but unlike most, Sans exhibits some unique abilities and knowledge of timelines.

There is a browser based simulator that gives players the chance to relive the notoriously difficult Sans fight from Undertale.

Sans, a major character in the cult indie game Undertale, will appear as a playable character in Pop'n Music. The Japanese rhythm game also introduces three new arrangements of songs from the ...

Omega's standard entrance video was interrupted with a dialogue scene in the style of Undertale - with custom graphics and authentic talking noises - where Sans offers to tag in.