Unlocking GeForce Now gives you access to Nvidia's internal database that a lot of work from home developers use for testing (last updated six months ago) which contains tons of unreleased games like:
God of War, Returnal and Demon Souls for PC
No mention of PS4's Spider-Man or Bloodborne for PC
GTA 3, Vice City and San Andreas Remasters
Some unannounced GeForce NOW games like Mafia: Definitive Edition
Even the new Uncharted Collection for PC (with its complete name) and Alan Wake Remastered are there
A lot of PlayStation Games/Ports (IMPORTANT! If it doesn't say Steam/Epic at the end it might just be a GeForce Now/PS Now crossover for testing (since PS NOW is also on PC))
Some announced and unannounced Xbox Game Studio's Projects (announced games like Avowed, Indiana Jones, Fable (Project Holland), Forza (Project Woodstock))
Some Nintendo Games like Super Mario Bros. Wii. show up because of Nvidia SHIELD in China
''Fight for Middle-Earth''
Half-Life 2 Remastered (under Valve Software)
Titan Quest 2 & Outcast (''at the THQ Nordic Event September 17th'')
''Project FPS (Paradox Interactive)''
Human: Fall Flat 2
''Hangar 13 unannounced''
The Talos Principle 2
''Total War 9''
Untitled Respawn Game
Kingdom Hearts IV
Untitled The Initiative Game (probably Perfect Dark)
Sniper Elite 5
''Monster Hunter 6''
Judgement with Mouse & Keyboard support (maybe not a PC version, perhaps Stadia?)
Halo 5: Guardians for PC
Cities Skylines 2
As Dusk Falls and As Dusk Falls Season 2
Space Punks for Steam (currently EGS exclusive)
Tomb Raider Anniversary (2021) and Tomb Raider 25th Anniversary (2021)
Destroy All Humans! 3
Earth Defense Force 6
Brothers in Arms by Gearbox
Dragon's Dogma 2
Resident Evil 4 Remake
Crash Team Racing Nitro-Fueled for PC
Chrono Cross Remaster
Shin Megami Tensei V and Catherine Full Body for PC (this is all from ATLUS, no Persona 5 mentioned)
Bioshock RTX Remaster, Mirror's Edge RTX Remaster, Batman: Arkham Knight RTX Remaster could be linked to this
Final Fantasy VII Remake for PC