About

Toby Fox's Undertale 10th Anniversary Stream is a livestream of the video game Undertale by its creator Toby Fox, set to take place on Twitch on September 20th and the 21st in celebration of the game's 10 year anniversary. The stream was announced by Fox on September 14th, 2025, a day before Undertale's official 10-year anniversary. On September 16th, Fox asked fans to pick a six-letter name that they wanted him to name the character for the playthrough, with Togore and Gaster being two of the most popular options, resulting in memes and posts campaigning for each name. Notably, "Gaster" cannot usually be picked as a name in Undertale, as it causes the game to reset to the title screen.

History

Announcement

On September 14th, 2025, Toby Fox, creator of Undertale, made a post on X^[1] announcing a two-day livestream playthrough of the game in celebration of its 10th anniversary. The stream is set to take place on Twitch on September 20th and 21st, 2025, and is accessible through the Undertale website.^[2]

Fox also commented under the post announcing that, on the 15th, he would ask fans what to name the character for the playthrough, writing, "Take this time to form factions and make it a good fight." The post gained over 59,000 likes in four days.

On September 16th, Fox made his post on X^[3] asking, "Hey guys, what name should we choose at the beginning of the game? (Name candidates must be 6 characters or less.)," garnering over 58,000 likes and 26,000 comments in two days.

Online Presence

The livestream inspired discourse, memes and posts on sites including X and Reddit.

On September 14th, 2025, X^[4] user @thebigmoop_ made a post wondering if a sequel to Undertale will be announced at the end of the stream, garnering over 2,500 likes in four days.

Togore Dreemurr vs. Gaster Character Name

Following the announcement of the livestream, Undertale fans began debating on names for the character, with Gaster, a reference to a character in the game, and Togore, a reference to a meme related to the game, being the most popular. This resulted in memes and posts campaigning for each name.

On September 15th, 2025, Redditor u/ArrivalPotential posted a meme about Toby choosing "Gaster" and the game not resetting to the /r/Undertale^[5] subreddit, garnering over 3,900 upvotes in three days.

On September 16th, X^[6] user @tablespectre posted a piece of artwork showing Togore and Gaster in a battle, garnering over 13,000 likes in two days. On September 17th, X^[7] user @ileum21706613 posted similar fan art that gained over 27,000 likes in a day.

On the same day, X^[8] user @jojoton56 posted a slang overload meme about choosing Togore or Gaster, garnering over 2,800 likes in a day.

Search Interest

External References