Valve testing ALL Steam games for Steam Deck compatibility

Valve is currently testing all Steam games to see which are compatible with the Steam Deck, publishes findings in public database.

Steam Community :: Guide :: Steam Deck Controller Guide - A Visual Introduction

Will Your Favorite Games Run on Steam Deck? Valve Just Made It Easy to Find Out

Here Are The List Of Games You Can't Play On Steam Deck - Game Informer

How to check a game's Steam Deck compatibility - Reviewed

Steam Deck Review: This Handheld Gaming PC Surprised Me, in Ways Both Good and Bad - CNET

Steam Deck™

Steam Deck “Compatibility Tool Failed” error: How to fix, possible reasons, and more

How to Check if Games Are Compatible With Steam Deck - Guiding Tech

You can now check your Steam library for Steam Deck compatibility

Valve ramp up Steam Deck compatibility testing, nearly 300 games get Verified status