This is another test of Portal: Prelude RTX on Steam Deck but this time using GAMESCOPE. Remember, to do this make sure you’re using SteamOS 3.5 via the preview channel, it updates the Mesa driver. On top of that make sure you’re using desktop mode because the game kept crashing while it’s in gaming mode. Remember to type the launch options shown in this video. And use any version of Proton. Everything in the settings is on low. So yeah, Portal: Prelude RTX on Steam Deck.
Portal With RTX on Steam Deck: [ Ссылка ]
Follow up to that video: [ Ссылка ]
Portal: Prelude RTX Test: [ Ссылка ]
