Bioshock 1 and 2
Black & White
Crysis 1, Warhead, and 2 (Original)
Deus Ex 1/GOTY, Invisible War, Human Revolution, and The Fall
Diablo 1 and 2
Dragon Age Origins and 2
Divinity Original Sin (Original)
Fable The Lost Chapters
FTL: Faster Than Light
GTA 3, VC, SA, and 4
Half Life series up to Episode 2 and maybe Black Mesa
Left 4 Deaf 1 and 2
LEGO Creator
Mafia 1 and 2 (Original)
Mass Effect 1, 2, and 3
Serious Sam 1, 2, and 3
Sid Meier's Civilization 3, 4, and 5
Sid Meier's Pirates
Starcraft 1 and 2
Starsector (Uses Java 7 but x64. Maybe could be replaced with x86 Java and still work idk.)
The Chronicles of Riddick series
The Legend of Heroes - Trails in the Sky 1, 2, and 3
Tomb Raider series up to GOTY/2013
Age of Wonders
Baldurs Gate 1 and 2
Neverwinter Nights 1 and 2
The Elder Scrolls series up to Skyrim (original)
The Fallout series up to New Vegas
Dishonored
DOOM up to 3 (maybe 2016 works on XP idk)
F.E.A.R series
Hitman series up to Blood Money
Just Cause 1
Metro 2033
S.T.A.L.K.E.R. Series up to Call of Pripyat
Shadow Warrior original and 2013
Stranglehold
The Saboteur
The Witcher 1 and 2
Vampire The Masquerade series up to Bloodlines
Daikatana
Red Faction series up to Guerrilla
Saints Row series up to 3
Wolfenstein series up to 2009(?)
Thief series up to 3/Deadly Shadows
Call of Juarez series
Counter Strike series probably with older versions and unofficial servers (except for 2 which won't work)
Garry's Mod (Probably old version as well)
Halo 1 and 2 with mods to work on XP
Portal 1 and 2
RimWorld (Maybe require old version)
Rust (legacy)
South Park The Stick of Truth
Team Fortress series probably with older versions and unofficial servers
XCOM series up to Enemy Unknown/Within (Enemy Unknown/Within requires mods to run)
Project Cars (Might require mods)
Assassins Creed series up to 4/Black Flag (3 and 4 require mods to run)
Bejeweled series
Brothers In Arms series
Call of Duty series up to Modern Warfare 3
Demolition Company Gold Edition
Driver series
Duke Nukem series
Far Cry series up to 3
Hyperdimension Neptunia Re;Birth1 (Not sure about later entries, but I think 2 and 3 are mostly the same engine wise so they probably work too)
LEGO games series up to 2016 or 2017
Marathon series
Midnight Club series
Mirrors Edge
My Summer Car (maybe older version)
BeamNG.drive (older version)
Peggle series
Prototype 1 and 2
Quake series
Race Driver GRID
Cube 2: Sauerbraten (maybe older version idk)
Star Trek game series before online
The Sims and spinoffs up to an older version of 4
Total War series up to Rome II
Unreal series up to Torunament 3
Toy Story 3 video game
Age Of Empires up to 3
Batman - Arkham Asylum and Arkham City
Goat Simulator (Maybe older version)
Princess Maker series up to some point idk
Long Live The Queen
Max Payne 1, 2, and 3(?)
Paradox Interactive games up to games supported by this patch
https://archive.org/details/eu4_winxp_fix