>>18916122I'll give a few more:
The Binding of Isaac can be a good time killer for when you're just bored.
Noita is another awesome game, however it is virtually impossible to discover everything in the game blind.
If you're into WRPGs & Immersive Sims, I'll reccomend you the typical Fallout New Vegas, Deus Ex 1, Vampire The Masquerade Bloodlines, Morrowind (look up a guide for how to play morrowind).
Hypnospace Outlaw is a fun unique game where you're sort of like a MySpace detective. Awesome visuals and music.