aside from the occasional error prompt (never appearing during gameplay itsefl) and the windows-vista-era menu appearnance, 100% playable
PROTON_USE_WINED3D=1 %command%
Fullscreen does not mix well with multiple displays or in-game menus
At start, controller configuration menus and others, an error E_NOTIMPL is displayed, but clikcing 'ok' allows to continue anyway
It doesn't work without a special launch command
Partially playable but the view you have is only 50% of the center of what you should be seeing. You can't see the menu or adjust settings
The sim installs fine. It is partially playable but the view you have is only 50% of what you should be seeing so you can't see the menu at the top or adjust lots of settings. It is basically broken but you can fly models in the sim to some extent. If you then click on 'select an aircraft' that is visible and then press the Steam Deck pause button on upper right corner of deck, it will show the model that was selected and allow you to play. You cannot get the mouse outside the view that you have though so you can't go outside the center 50% of the screen to change settings, etc.
You can mainly fix the view issue by changing 'WindowMode=INT:2' to 'WindowMode=INT:1' in the file '/home/deck/.local/share/Steam/steamapps/compatdata/748460/pfx/drive_c/users/steamuser/Documents/RealFlight\ 8/RealFlight.ini' (assuming you installed to built in SSD drive) to get the proper view. The 748460 might be different for your install... I am not sure if that is the same for the same game on different steam decks. You still can't see the main menu at the top though to change most of the settings. You can select an RC model to fly and fly it though.
Fullscreen makes it unusable.
I always get the Error: E_NOTIMPL File: DXControllerG2Interlink.cpp Line: 97 but clicking through it allows the game to load. (using the Spektrum SPMWS1000 dongle)
Works well with Proton Experimental. While starting, it showed error not seeing a controller (Spektrum WS1000 dongle plugged in), so I plugged in an Xbox controller to get past it. Go to controller calibration and select WS1000 dongle. I had to remap the transmitter joysticks and switches. Fullscreen broke it, but you can toggle via Alt-Enter.
Warning Dialogue appears, exits after click ok
"KEError 32318: Unable to determine certain information about your computer. This software may or may not work properly"
Doesn't Work Even w RealFlight InterLink Controller
Shows the splash and then exits the game. I assume they do a check to make sure you have the required controller and this check fails because of a Linux compatibility issue. My RealFlight controller does work fine in Linux though and I've been able to play with it using the native version of the Lift-off drone simulator.
It doesn't even start with 4.2-9 nor 4.11-2. It is a simulator that requires specific hardware to work, so that might not even be compatible with linux yet.