Uncanny Tales: Cold Road
https://store.steampowered.com/app/3534240/Uncanny_Tales_Cold_Road/

Stickman Killing Zombie
https://store.steampowered.com/app/2792610/Stickman_Killing_Zombie/

Legend of Keepers: Career of a Dungeon Manager
https://store.steampowered.com/app/978520/Legend_of_Keepers_Career_of_a_Dungeon_Manager/

NineHells
https://store.steampowered.com/app/2860410/NineHells/
free until April 20th

https://store.epicgames.com/en-US/p/propsumo-ca8bd7

ends in 2 days

Living Forest
https://store.steampowered.com/app/3027490/LivingForest/

Graveyard Keeper
https://store.steampowered.com/app/599140/Graveyard_Keeper/

Graveyard keeper is also available on other platforms (like playstation, xbox...) some are region locked

https://store.steampowered.com/app/2943780/Chamber_Survival/
Free until April 9th, 13:00 UTC

For ASF users: !addlicense asf s/1599841