Square Enix has announced a collaboration with Toby Fox’s Undertale.

The collaboration will include music and merchandise to commemorate the game’s 10th Anniversary, although no further details have been shared. You can check out a message from Toby Fox about the collab below:

Things a little strange, but somehow wonderful, are starting to take shape. pic.twitter.com/HKpXarUVyR

— Square Enix (@SquareEnix) November 21, 2025

Huh?! UNDERTALE X SQUARE ENIX?!
Yeah, you read that right.
To celebrate UNDERTALE’ s 10th anniversary,
a special collaboration with SQEX Music & Merchandising is happening! things a little strange, but somehow wonderful, are starting to take shape. There are even whispers of some mysterious new merch…
Music, apparel
And this project isn’t stopping in one place it’s rolling out worldwide! With ten years of DETERMINATION in its heart,
SQEX Music & Merchandising will deliver this quirky dream collaboration to fans across the globe!

What do you think? Let us know in the comments.