HELLDIVERS 2 is currently doing really well on Steam with a ton of players, and initially it was quite a nuisance to get working on Steam Deck / Desktop Linux, but now it should run much better.
Valve developer Pierre-Loup Griffais mentioned on X (formerly Twitter), that Proton Hotfix was updated to work around the launch issues. So all you'll need to do now is go into the Properties -> Compatibility, tick the box and select Proton Hotfix for HELLDIVERS 2 to get it working properly!
Nice to see once again Valve spring into action to improve Proton to get popular games working! Especially interesting that it uses nProtect GameGuard, which is supposed to be Windows kernel-level, so it's surprising it works so easily on Linux systems now.
At time of writing HELLDIVERS 2 has 100,768 players online just on Steam, so it's clearly another big early hit for 2024. And it seems the most popular Sony PlayStation release on Steam so far.
Check out the trailer:
If you do want to buy it's available from: