Undertale

Undertale is an indie RPG created by Toby Fox and Temmie Chang. The main gimmick of the game is its adaptability, with the plot changing based on the player’s decisions. Most notably, Undertale is famous for its ability to win by doing a "pacifist run," that is, not killing a single random encounter or boss creature. However, it is also possible to perform a "genocide route" and kill every NPC. The game became a smash hit across the Internet, with audiences praising it for its writing, characters, and music.

Deltarune, despite popular misconception, is not a sequel to Undertale.

In GameToons
Undertale Logic was released on June 19th, 2021, making it the ninth game to be adapted by GameToons. It stars Player in the role of the player character. It begins in media res with him facing Sans in the Judgement Hall, implying that he has done a genocide run. It ends abruptly, suggesting that future videos in this series are planned. Unlike other GameToons series, there is no indication that the Undertale characters are alternate versions of his friends from Among Us Logic.