While NINJA GAIDEN 4 is Steam Deck Verified, it turns out on Desktop Linux it has some big problems that Valve have hopefully solved now.

Announcing it on Bluesky, Valve developer Pierre-Loup Griffais mentioned “A Proton Hotfix has been deployed for the NINJA GAIDEN 4 hang issue on desktop”. Looking on the GitHub report, seems many people were seeing the game constantly freeze. Valve have now set it by default for the game.