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.

Valve to verify which games will work on Steam Deck - CNET

Valve Steam Deck Review - Reviewed

You can now check which games in your library are Steam Deck compatible

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

Valve is Hiring People to Check Steam Deck Game Compatibility : r/linux_gaming

Steam Deck compatible games: almost 300 games given Verified rating - Polygon

Steam Deck Review: Valve's Handheld Gaming PC Tested!

Complete list of Steam Deck verified racing games

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

Valve adds official Steam Deck compatibility checker, 762 games Playable or Verified

The Steam Deck wasn't born ready, but it's ready now - The Verge

Check Which Games Are Playable On Steam Deck Before Launch - IGN

Valve Steam Deck review: Ultimate handheld, almost - Dexerto