A few middle-aged games, a few newer ones and a few older ones.

Deep Rock Galactic
Doom Eternal SE
Fallout 76
Warhammer 40,000: Chaos Gate
Wasteland 3
Phoenix Point Year One Edition
Deathloop
GreedFall
Tiny Tina's Wonderlands - Chaotic Great Edition
Pumpkin Jack
Kingdoms of Amalur: Re-Reckoning FATE Edition
Monster Train
Monster Train: The Last Divinity DLC
Witcher Tales Thronebreaker
Encased: A Sci-Fi Post-Apocalyptic RPG
Warhammer® 40,000: Dawn of War
Necromunda Hired Gun
Tribes of Midgard
Command & Conquer: Red Alert 3 - Uprising
Dead Island Riptide - Complete
Ghostrunner
Mafia: Definitive Edition
Call of the Sea
Disciples: Liberation - Standard Edition
Titan Quest Steam Key (Germany)
Legion TD 2 - Multiplayer Tower Defense
Crysis 2 Maximum Edition
The Incredible Adventures of Van Helsing - Complete Pack
Man of Medan
Mirror's Edge
Burnout Paradise: The Ultimate Box
Risen 2: Dark Waters, Sacred 2: Gold Edition, Saints Row 2, and Saints Row: The Third (Steam Bundle)
Medal of Honor Origin Key
Metro 2033, Risen, and Sacred Citadel (steam bundle)
Populous Origin Key
Grow Song of the Evertree
Saints Row: The Third (Low Violence)
Iron Harvest
Dead Space
Dead Space™ 2
Dead Space 3 Origin Key
Galactic Civilizations II: Ultimate Edition
Nebuchadnezzar
Deadlight
Sonic & All-Stars Racing Transformed
NiGHTS Into Dreams
Dreamcast Collection
Mass Effect™ 2
Dragon Age™: Origins
Bejeweled™ 3
Pinball FX2 Zen Studios F.C.
Pinball FX2 Venom
Pinball FX2 The Walking Dead
Pinball FX2 Star Wars Pinball: Star Wars Rebels
Pinball FX2 Marvel's Avengers: Age of Ultron
Pinball FX2 Iron & Steel Pack
Pinball FX2 Guardians of the Galaxy
Pinball FX2 Ant-Man
Pinball FX2 - Star Wars™ Pinball: Balance of the Force Pack
Pinball FX2 - Base game and Civil War Table
VRMark Advanced Edition
Sid Meier's Civilization IV: The Complete Edition
Sid Meier's Civilization III Complete
Ziggurat
Windward
Steamworld Heist
Rustler
Retrowave
Rebel Cops
Project Winter
Midnight Protocol
The Henry Stickmin Collection
Farmer's Dynasty
Between the Stars