Currently, it supports over 160 games, with new titles being added constantly. Play games from the likes of Steam® and Uplay™ PC. Play popular games such as Overwatch, Civ 5, Fallout 4 and much more are all playable at max settings.
All game patches, game configs and driver updates are handled by the GeForce NOW infrastructure. “Supported games on GeForce NOW are instantly installed onto your cloud gaming rig in seconds, and automatically applies the latest patches to games and NVIDIA Game Ready drivers. Sign into your Steam account and start gaming immediately.”
Although this if for low-spec PC’s and Mac’s they must still meet the system requirements. For PC you must have an Intel i3 with 3.1GHz or faster CPU, 4GB of system memory and any GPU that at least supports DirectX 9 (NVIDIA GeForce 600 series or newer, AMD Radeon HD 3000 series or newer or Intel HD Graphics 2000 series or newer). For Mac’s you can find the full list here.