Pioneering German experimental duo Mouse on Mars is verging on its 21st year, and to commemorate over two decades of of near-constant creative evolution, group members Jan St. Werner and Andi Toma have revealed details for an anniversary compilation. Notable as one of the few German pop acts to gain international recognition (in the company of Kraftwerk, Tangerine Dream, and Neu!), the forthcoming release, 21 Again, is reportedly not intended as to serve as a retrospective—which would constitute a major project itself, given the pair’s extensive discography and history of collaborative projects—but rather extends the Mouse on Mars sound continuum into a new decade, with the likes of Atom TM, Machinedrum, Modeselektor, and 20 other artists all making appearances.

21 Again will see official release on October 31 via Berlin-based outpost Monkeytown as a double CD, and both artwork and a full tracklist can be found below. A Mouse on Mars Jubilee Box Set, limited to 500 copies, is also in the works, which will include not only a copy of the new compilation, but also a CD of archival, unreleased material, a recording of “Paeanumnion,” an orchestral piece composed by Mouse on Mars and played by Klangfabrik Köln, an LP of the group’s four Peel Sessions, and texts by Chris Sharp of London’s Barbican and CTM Festival director Jan Rohlf.

Eli & Mark E. Smith: 21 Again
Mouse On Mars & Cavern of Anti-Matter: Fertilized
Mouse On Mars & Tortoise: Shoe Fly
A Hawk And A Hacksaw & Balàzs Unger: Celebration Song
Mouse On Mars & Errorsmith: Errormom
Mouse On Mars & Eric D Clark: Lost And Found
Mouse on Mars & Modeselektor feat. Mr. Maloke: Purple Fog
Mouse on Mars & Siriusmo: Immer Kurz Davor
Mouse on Mars & Scratch Pet Land: Splymogym
Mouse on Mars & Dodo NKishi: Queen Für Erschein
Mouse On Mars & Atom TM: Key My Brain
AGF / Delay Team: 21 Momstars
Mouse on Mars & Helado Negro: Carca Jadas
Mouse On Mars & Laetitia Sadier: My Toe Is On Fire

Ingrid & Oswald Wiener: Wir möchten auch drauf sein
Mouse On Mars & Schlammpeitziger: Ein Leben Wie Heu
Mouse on Mars & Junior Boys: Putty Tart
Mouse on Mars & Candie Hank: Metaloona Swamp
David Michael Digregorio & Sung Huang Kim: We’re Glad You Are Born Today, Unless You Weren’t Born Today
Mouse on Mars & Machinedrum – Juice Clr 9
Mouse On Mars & Mesak & Claws Costeau: Somiak
Mouse on Mars & F.X. Randomiz: Fromm
Prefuse 73: 90’s
Mouse on Mars & Funkstörung: Bon Djerry
Mouse on Mars & Yoshimi: NKANKA
Mouse on Mars & Matthew Herbert aka DJ’s Collapse: Double Gum
Mouse on Mars & Olivia Block: Pterion
Mouse on Mars & Oval: Gitto Ski
Mouse on Mars & Tyondai Braxton: Off Sea
DJ Scotch Egg: Mouse On Egg (Happy Birthday!)