Stellaris Cyberpunk No man's sky (idk if it counts as single player per se)

Fromsoftware games and Monster Hunter games

Spelunky (HD/2) is my goto chill game. Put Spotify on and just start going for the hard end. It's a 2D, roguelike platformer about exploring a series of caves, and shouldn't be as addicting as it is.

I have no idea why, but I cant get enough of it. 200 hours in HD, 250 in 2, and I also had it on X360 a while back that didnt track time.

Hollow Knight

Killer7 Bloodborne Darkest Dungeon

Tyrian, but I'll just go to the main menu, enter the secret code and play the hidden turrets game for hours.

I play far too much cities skylines

Red Dead Redemption 2 for so many reasons.

Empire Earth 2. Old but good.

Eufloria Classic

Almost perfect "simple" rts. Nothing terribly complicated about how it works. Really the only thing that keeps me from saying it is perfect is the lack of ability to set rally points for units or select multiple planets to move all the seedlings(units) all at once.

In the category of "bullet-heaven" / vampire survivors I have been putting a lot of time into Bio-Prototype. It has a really amazing upgrade/combination system for your weapons. And it also only costs like $4

I know it's not 100% single player, but it's how I play it anyway, D2 and all of its mods.

Ruiner. F'kin banger soundtrack.

Assassin's Creed Odyssey