https://www.gamespot.com/articles/here-are-all-the-free-games-you-can-play-this-week/1100-6456833/

At any given time, there might be some sort of free game or free-play promotion going on, but right now it feels like there's an inordinate number of these happening at the same time. Specifics vary by platform and what memberships you have, but if you've got some time this weekend, there's likely something you can check out (or acquire permanently) for free.