Xbox One:
Sunset Overdrive
Available untill May 15th
Store link: https://store.xbox.com/en-GB/Xbox-One/Games/Sunset-Overdrive/3d595ce4-5a7b-4217-a6b8-8f23b3a8acea
Metacritic: 81
Xbox 360 (Playable on Xbox One via Backwards Compatibility):
Saints Row IV
Available until April 30th
Store link: http://marketplace.xbox.com/en-GB/P...115-d8024b4d07f6?nosplash=1&DownloadType=Game
Metacritic: 81
Note: The 360 store prices take a while to update the prices for all regions, if it's not showing as free for you try again soon. It should have rolled out for everyone within an hour of this post. The time of it appearing as free depends on where you live so I can't help here.
Previous GwG's still available:
The Wolf Among Us
Available until April 30th
Store link: https://store.xbox.com/en-GB/Xbox-One/Games/The-Wolf-Among-Us/f5b8be2c-58f9-427b-8e12-2786d03dc55f
Metacritic: 83
Tried to make the thread look fancy since the last one was a bit empty, hopefully I didn't overdo it