Here are some games I have gathered. Some are free to download for a few days while others offer a free to play weekend.

Creature in the well
https://www.epicgames.com/store/en-US/p/creature-in-the-well

Magic Legends
Get the exclusive Epic Planeswalker Starter Pack free until April 6
https://www.epicgames.com/store/en-US/p/magic-legends

Cat on a Diet
https://freebies.indiegala.com/cat-on-a-diet

Survivalist
https://freebies.indiegala.com/survivalist

Hell Let Loose free weekend
Play for free until 29 Mar 7:00pm
https://store.steampowered.com/app/686810/Hell_Let_Loose/

Watch Dogs: Legion Free Weekend on EpicGames and Ubisoft
https://www.epicgames.com/store/en-US/p/watch-dogs-legion#editions

https://www.ubisoft.com/en-us/game/watch-dogs/legion/news-updates/1VHqUt5zcoSIcIkVCoIWF5/watch-dogs-legion-free-trial-weekend

Sid Meier’s Civilization VI free weekend
Play for free until 29 Mar 7:00pm.
https://store.steampowered.com/app/289070/Sid_Meiers_Civilization_VI/

Also, you can download a selection of 9 PSN free games
-ABZU
-Enter the Gungeon
-Rez Infinite
-Subnautica
-The Witness
-Astro Bot Rescue Mission
-Moss
-Thumper
-Paper Beast

https://blog.playstation.com/2021/03/17/play-at-home-2021-update-10-free-games-to-download-this-spring/amp/

And finally Shadow Night Premium, an Android game
https://play.google.com/store/apps/details?id=com.fansipan.stickman.shadow.knights.fightinggames