RIMS had controller detection issues in the past prior to the 1.5 update. As many users report could be fixed by disabling steam input however this doesn't still doesn't make a difference on the Steam Deck for some reason. Even tried pairing an Xbox controller that RIMS on windows detects instantly but even when detected by the steam deck for SteamOS navigation, RIMS still doesn't see the deck as a controller or the paired Xbox one controller either. Makes the game unplayable as you lose analog throttle and bake.