Vampire Survivors on the steam deck.
Rimworld
RimWorld is a time machine. I start it up and then look at the clock and I’m 5 hours in the future.
I’ve once started a colony right before exams period. It was tough.
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doom
Cyberpunk. They fixed most of the issues the game had at launch. There’s a dlc coming out soon too that will add a bunch of hours, and with it they are reworking loads of mechanics for free. Can’t recommend it enough.
Zombies vs Plants.
Binding of Isaac
+1. Just turned 300hours corner, and I’m not done at all.
Dwarf Fortress is beautiful.
This is my answer. Donated to Toady1 a couple times, then bought it on steam.
Same here, donated to Toady and played for years before moving to masterwork DF, and years there too. Once the keyboard only mode is added to the steam version I’m sure I’ll be playing for years there too!
Rogue Legacy 2
If you enjoy platformers and roguelikes, you’ll like this.
The Binding of Isaac. One of the GOATs for me.
Ultima and Wing Commander, I know I’m showing my age but I guess it’s the nostalgia. I still go back and play through them.
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Good ol’ Skyrim. The possibilities to break the game are nigh endless.
You know there is a skyrim mods community here on lemmy? Come break the game with us!
Ruiner. F’kin banger soundtrack.
Civilization 4: Fall from heaven: Ashes of Erebus. It can be played multiplayer of course, but I almost exclusively play single-player. The lore is fun, the event system can be interesting, the combinations of awesome Civs+Leaders+Religions+Magic really up the replayability. The end game with hundreds of units amongst a large number of factions with hell terrain encroaching makes for a very dynamic endgame.
Fallout: New Vegas