Perfect performance on Steam Deck

By default the game has badly performance on Steam Deck but there is a way to fix it.

Preparation

Go to desktop mode:
1. Steam
2. Power
3. Go to Desktop Mode

When Desktop loaded open the Discover, find ProtonUp-Qt and install it. After installation launch the ProtonUp-Qt and add new version of Proton is "Proton-6.5-GE-2". When it loaded and added to list of ProtonUp-Qt you can go back to Steam mode.

Configure the game

1. Open the game card
2. Open the Settings (gears icon at right side)
3. Choose "Properties..."
4. Choose "Compatibility"
5. Enable compatibility tool and choose "Proton-6.5-GE-2" in the list

Now you can run the game and get 2-3x more FPS.

My in game settings

Open Settings > Video in the game menu.
1. Resolution 1152×720
2. Quality "Balanced"

Open Steam Deck settings "•••" at the ride side of Deck.
1. Performance
2. Enable Game profile
3. Lock FPS and refresh rate as 45 (FPS/Hz) - it's good enough for racing games, imho
4. Allow tearings
5. Enable TDP limit to 6
6. Scaling is FSR, sharp 2

With these settings you can get up to 4 hours.

Thanks

This instruction is based on two sources:
Video from "Pikas pod strzechą" about setup Proton version https://www.youtube.com/watch?v=ttS3lQiwJwk
And notice from "Flowyflo99" about installation correct Proton version https://www.reddit.com/r/SteamDeck/comments/yjryyx/comment/iuptc89/?utm_source=share&utm_medium=web2x&context=3

[Digitall Camo]

Для простоты загрузки Proton и не только, советую установить Decky Loader с GitHub.
В магазине найти Wine Cellar и оттуда установить необходимую версию.

[[MotorshoW]]

Now, to install Proton 6.5 you have to do this manually.
1. Go to Desktop Mode on the Deck.
2. Open Konsole (why K, not C? :D)
3. Run commands in order:
(3.1) mkdir /tmp/proton-ge-custom
(3.2) cd /tmp/proton-ge-custom
(3.3 WAIT TILL DOWNLOAD ENDS) wget {LINK REMOVED}"https://github.com/GloriousEggroll/proton-ge-custom/releases/download/6.5-GE-2/Proton-6.5-GE-2.tar.gz"
3.4 tar -xf Proton-6.5-GE-2.tar.gz -C ~/.steam/root/compatibilitytools.d/

Then just run game with options from main message, and have a GREAT performance in game.
Hope, that such method would work more than couple of months :)