I've put a lot of time and money into Rocket League, including working on GNU/Linux support for BakkesMod. This is a damn shame.<p>Second follow up: I have Proton running RL consistently at 250 FPS using the following start command: PROTON_USE_D9VK=1 %command% -nomovie -high -AllowBackgroundAudio<p>First follow up: With the native version, I can keep a steady 250 FPS (the in-game max). With the Steam Play version, using Proton 4.11, I average around 145 FPS. Certainly not the same.