I installed on Steam Deck by just clicking the 'Install' button on Steam, so I don't know if the native Linux version was used or the Windows version with Proton. Either way the game worked apparently flawlessly. I played ~6 hours on the Deck, about the last 1/3 of the game. Played 3 Liberation rites, probably 10-15 rites in total, and watched the ending sequence. I had no performance, audio, video, or control problems.