Whitelist Request

System Information

• GPU: RX 480
• Driver/LLVM version: Mesa 19.3.1/9.0.0 (ACO enabled)
• Distro version: Arch Linux
• Link to full system information report as Gist: My Steam info
• Proton version: 4.11-11

I confirm:

• [x] that pressing the Play button in the Steam client is sufficient.
• [ ] that runtime config options are necessary to run the game.
• [x] that no workarounds other than PROTON_* env variables are necessary.

Issues

• [x] I haven't experienced any issues.
• [x] There are no issues left open for this game.
• [ ] Although I consider the gaming experience equal to Windows there are remaining issues:

Playtime under 1 hour, online multiplayer not tested.

There are issues when the Steam Deck is on the dock station as doesn't detect the second controller, instead says press F2 to add a second player.
Pressing that instead switch to keyboard mode.

So basically this is what happening with the game, or you play with a keyboard or with a controller but just with one player.
Because if you switch to keyboard you can't do anything basically like switching back to controller.
So on SteamDeck with dock station is not possible to use 2 external controller, also changing the priority and changing the layout to the keyboard itself.

It is very sad because is a perfect game to play in 2 and it isn't possible.

PS: tastiera is keyboard in italian and you can see that shows keyboard buttons also if identify a controller.

So thanks to vinh@os (account on steam) that created a custom controller mapping I discovered how to achieve to play with 2 players (that mapping is not needed)!
You need a mouse and a keyboard connected, so set the first player with the controller, now press F2 and with the mouse on the screen on the green bar in the bottom of every player there is kind of an arrow that let's you to define what controller to use, in that way you set the controller also for the other player and you can play!