Game Sessions and AMD is running a promotion where if you play Ryse Son of Rome for 5 minutes you can keep it in your library for free.
This is not a Steam code.
1) Download Installer
2) Installer downloads full game
3) Run game from desktop
4) Play for 5 minutes to activate game on account
FYI - Game Sessions is a try before you buy site. Most other games require you to pay to continue playing after a set trial time.