IMPORTANT! You can check fake geforce games here, this list was provided by Pavel. There are a few games showing up that sound more like placeholders then actual games (Bioshock RTX Remaster, Batman: Arkham Knight RTX Remaster, Mirror's Edge RTX Remaster).
It is important to say that whatever shows up here, isn't a 100% confirmation for a PC port. Seems like most of the games here are just for testing and all of this could be a collaboration between Sony (PS NOW) and Nvidia (GeForce NOW). Games like God of War however explicitly mention Steam with the right publishing lable aswell as a STEAM ID entry. These games are probably legit.