The Epic Games store gives away games every week, and all you have to do to claim them is sign up for a free account. Even if you don’t have the space on your computer to store all of the games it gives away (or the time to play them), it’s worth signing in and claiming them for your library regardless. Once claimed, the games in your library never expire, and you can download and play them at any time. The quality of the games are usually pretty great, too—previous giveaways have included the Tomb Raider Trilogy (that’s 2013’s Tomb Raider, Rise of the Tomb Raider, Shadow of the Tomb Raider, and all downloadable content released for each title), Borderlands 3 and Borderlands: The Handsome Collection, BioShock: The Collection, Prey, and Grand Theft Auto 5. Additionally, Epic offers solid indie games in its weekly rotation, which is an easy way to try out new games and genres you might not typically spring for. To see which games Epic is currently giving away, visit the free games page on its website.
Source: https://www.nytimes.com/wirecutter/reviews/free-video-games/
