https://www.techradar.com/news/twitch-prime-subscribers-will-now-get-free-monthly-games

Joining the likes of PlayStation Plus and Games with Gold, Free Games with Prime is a new service from Twitch that will award its Prime subscribers a handful of free PC games every month. 

The first wave of games will come on Thursday March 15 and will include Superhot, Oxenfree, Shadow Tactics, Mr. Shifty, and Tales from Candlekeep: Tomb of Annihilation. These titles will be available to claim until March 31. When April rolls around, subscribers will be able to claim Telltale’s Tales from the Borderlands, SteamWorld Dig 2,Tokyo 42, Kingsway, and Dubwars.