Currently tuxDB.com found games that are Steam Deck categorized

Verified: 4795

Playable: 9894

Not working: 3974

All functionality is accessible when using the default controller configuration
This game's default graphics configuration performs well on Steam Deck
In-game interface text is legible on Steam Deck
This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
Notes:
◾ This game does not support attached controllers for the primary player

Check Steam Deck categorized games based on your Steam Name/SteamID