In order to play GTA V, you need to own the game on Steam.
Follow these simple steps:
- Create your Vortex account (click)
- Get GTA V on Steam. The game must be set to public as well as your Steam profile.
- Play GTA 5 here!
Please note that Rockstar, the creator of GTA V, owns a Social Club - that is a launcher for GTA V. However, Vortex offers only the Steam version of GTA V. Therefore, you can play GTA V via Vortex if you bought it on Steam.