Ubisoft is giving away one free game a month, beginning now until December. This month they’re giving away Prince of Persia: Sands of Time.
https://30years.ubi.com/en-US/operation-index
To take advantage, you’ll need to download Uplay and create a Ubisoft account.
Thanks for the heads up! One of my all time favorite games.
For the month of July, the free game is Tom Clancy’s Splinter Cell.
Jeez, someone tell them to give away games I don’t already own! 
The games are old enough that you probably got them on disc. At least now you have digital versions as well.
The free game for August is Rayman Origins.