Hello!
The following mobile games are free for a short time.
The expiry dates are not clear.
A-2481
Genre: Horror / Adventure
Link: https://play.google.com/store/apps/details?id=com.agaming.a2481
The Lost Lands: Dinosaur Hunter
Genre: Shooter / Simulation
Link: https://play.google.com/store/apps/details?id=com.agaming.thelostlands
Everybody’s RPG
Genre: RPG / Idle
Link: https://play.google.com/store/apps/details?id=com.nomadgames.everybodyrpgpay
Dungeon Shooter
Genre: Action / Shooter (looks a bit like the old DOOM games)
Link: https://play.google.com/store/apps/details?id=com.imcrazy.ds2
Enjoy.