Here is a list of all of that games that have been announced for Google Stadia so far. Click on any game for details.
Assassin’s Creed Odyssey 
Baldur’s Gate 3 
Borderlands 3 
Darksiders Genesis 
Destiny 2: The Collection 
Doom (2016) 
Doom Eternal 
Dragon Ball Xenoverse 
Farming Simulator 19 
Final Fantasy XV 
Football Manager 
Get Packed 
GRID 
GYLT 
Just Dance 
Marvel’s Avengers 
Metro Exodus 
Mortal Kombat 11 
NBA 2K20 
Power Rangers: Battle for the Grid 
Rage 2 
Rise of the Tomb Raider 
Samurai Shodown 
Shadow of the Tomb Raider 
The Crew 2 
The Elder Scrolls Online 
Thumper 
Tomb Raider: Definitive Edition 
Tom Clancy’s Ghost Recon Breakpoint 
Tom Clancy’s The Division 2 
Trials Rising 
Watchdogs: Legion 
Wolfenstein: Youngblood