Cuphead (platformer)
Europa Universalis IV (grand strategy)
Hearts of Iron IV (grand strategy)
Civilization V or VI (turn-based strategy)
The Isle (if you like dinosaurs)
Prehistoric Kingdom (if you like caging dinosaurs)
Planet Coaster (theme park building)
Planet Zoo (zoo building, not released yet)
Minecraft ( )
Wynncraft (the Minecraft MMORPG)
Terraria (adventure platformer sandbox rpg whatever)
Ultimate Epic Battle Simulator (for simulating ultimate & epic battles)
Totally Accurate Battle Simulator (for simulating totally accurate battles)
Universe Sandbox 2 (for simulating literally the universe)
Universe Sansbox 2 (for simulating sans undertale)
Everything (where you can play as everything)
War Thunder (war game but I wouldn't trust it cause it made my steam crash once and it deinstalled all of my steam games for some reason)
console games
Red Dead Redemption II (very good game)
Fifa (football game, apart from that its developed by EA and every year we get a new slightly different version that costs 60 euros its a pretty good game)
Steep (its a game where you go skiing but you can also snowboard and fly with a jetpack thing which is cool)
LittleBigPlanet (I played this when I was younger a lot, it's basically mario maker but better in every way)