In another clear case of anti-cheat woes for Steam Deck and Linux desktop gaming, The Division 2 is another broken game. Ubisoft continue their shift back onto Steam, with Tom Clancy's The Division 2 launching January 12. If you were excited to give it a run on Steam Deck though, or a Linux desktop, you're completely out of luck right now. Update: a fix was released.
The Division 2 uses Easy Anti-Cheat, and while that tech does support Linux and Proton, Ubisoft have seemingly not enabled it. That, or there's other technical issues currently with Proton and support for Easy Anti-Cheat. We've seen some issues in the past like glibc updates breaking Easy Anti-Cheat, so it could be related.
Currently, no matter the version of Proton picked either the official Proton or the community-made GE-Proton, The Division 2 will load until the Easy Anti-Cheat logo screen and then just get stuck in a loop trying to load it forever until you force-quit the game.
Shame, could have been a good fit for the Steam Deck.