It's worth noting that some of the games on this list weren't played through Steam, but were played on non-licensed versions before being purchased later out of solidarity with the developers, which is why they're included in the list.

Dying Light
Dying Light 2
Days Gone
Cyberpunk 2077
Sea of Thieves
Valheim
METAL GEAR SOLID V: THE PHANTOM PAIN
Dead Island 2
Risk of Rain 2
Borderlands 3
Cuphead
Ghost Recon Breakpoint
Borderlands 2
Metro Exodus
Far Cry 5
The Forest
DEATHLOOP
Titanfall® 2
Escape the Backrooms
Mafia: Definitive Edition
The Callisto Protocol
Sniper Elite 4
Wolfenstein II: The New Colossus
Crysis 2 Remastered
Sniper Ghost Warrior Contracts
INSIDE
A Way Out
METAL GEAR SOLID V: GROUND ZEROES
Valiant Hearts: The Great War™ / Soldats Inconnus : Mémoires de la Grande Guerre™
SKYHILL
Little Nightmares
Hellblade: Senua's Sacrifice
Hitman: Absolution
The Witcher 3: Wild Hunt
Guns, Gore and Cannoli 2
Borderlands: The Pre-Sequel
Beholder
Crysis 3 Remastered
Far Cry® 3
Guns, Gore & Cannoli
Metro 2033
LIMBO
Sleeping Dogs: Definitive Edition
Sniper Elite V2
Sniper Elite 3
Sniper Elite: Nazi Zombie Army
Sniper Elite: Nazi Zombie Army 2
Wolfenstein: The New Order
Wolfenstein: The Old Blood
Call of Duty: Modern Warfare III (2023)
PAYDAY 2
Dead Island Definitive Edition
Dead Island Riptide Definitive Edition
Metro: Last Light
Kingdom Come: Deliverance
Crysis 2 Remastered
Crysis Remastered
Half-Life 2
Half-Life
Quantum Break
Resident Evil 7
Marvel's Guardians of the Galaxy
Doom Eternal
Red Dead Redemption 2
Warhammer 40,000: Space Marine 2
Tiny Tina’s Wonderlands
Mad Max
Rage 2
Sons of the Forest