Undertale x Square Enix music and merchandise collaboration revealed

Square Enix and Toby Fox have announced a new collaboration that will see merchandise, albums, and more released globally for Undertale 's 10th anniversary.

The collaboration will begin with Chite De Chill, a new Chill Arrangement series release from Square Enix, featuring music from Undertale. There will also be a Piano Arrangement Album from Yoko Shimomura. You can find the announcement art with details from the official website below:

Huh?! UNDERTALE × SQUARE ENIX?!

…Yeah, you read that right.

To celebrate UNDERTALE’s 10th anniversary, a special collaboration with SQEX Music & Merchandising is happening!

Music, apparel… things a little strange, but somehow wonderful, are starting to take shape.

There are even whispers of some mysterious new merch…

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!

The Chitei De Chill album can be pre-ordered here in North America and here in the EU. It is expected to ship in February 2026.

More products and details will be revealed on the official collaboration website here.

Undertale is now available on PS4, PS Vita, Xbox, Nintendo Switch, and PC.