https://www.gamespot.com/articles/next-free-amazontwitch-prime-game-is-available-las/1100-6456803/

Those in the market for a new game that won't cost them a penny are in luck, provided they have an Amazon Prime membership. The next free PC game to be offered through Twitch Prime--which is one of the perks of an Amazon Prime membership--is now available, and it's a good one.