There are two free games from Epic, as part of their usual weekly giveaway.
Further as something a bit unusual, Sega is giving away games as part of their 60th anniversary.
The games from Epic are Kingdom New Lands
https://www.epicgames.com/store/en-US/p ... lands/home
And Amnesia: A Machine for Pigs
https://www.epicgames.com/store/en-US/p ... -pigs/home
I'm not certain how many games are coming from Sega.
The deals do not appear to last very long.
Fortunately you can activate the products on Steam, or elsewhere if you like.