According to
Wiki
, the most played games are as follows.
Pay to Play
Free to Play
PlayerUnknown's Battlegrounds (PUBG)
CrossFire
Minecraft
Dungeon Fire Online
Among Us
Pac-Man Doodle
Tetris
QQ Speed
RuneScape (subscription)
Candy Crush
Microsoft Solitare
Here were what the numbers looked like in 2015:
Here is a video of the most popular games from 2004-2020.