I usually play indie stuff. It feels more like a labor of love than big, corporate AAA titles. That said, the only two must haves, Imo, are Omori and Dwarf Fortress. Neither game is perfect, but they are both incredible, unique experiences. With Dwarf Fortress, enter with plenty of prior knowledge, but with Omori, play it blind. Very important for both games.

Gone Home.

Celeste.

Most of Pokemon fan games (my boyfriend loves fangames)

Factorio has been my crack-torio for many years. Satisfactory may have better graphics, but I prefer the simplicity and depth of Factorio.

I would say Hades.
The gameplay loop, the art direction and the story are all very good.

The games that stuck with me are (in no special order) Paradise Killer, Sable, Disco Elysium, Gris and of course What remains of Edith Finch.

Superhot, Katana Zero, Hotline Miami, Celeste

I play Ring of Pain a lot. It puts me in “just one more time” mode a lot and I end up playing for way longer than I intended.

Subnautica. One of the best experiences I’ve had in gaming.

Outer Wilds. One of the most creative and thought-provoking games I’ve played. Definitely go into this one knowing as little as possible about it.

Hollow Knight also deserves a spot here, but personally I preferred Salt and Sanctuary.

Gris. Gorgeous visuals and stress-free gameplay

Not incredibly long either

Celeste is one my favorite games of all time!

Oh disco elysium for sure. Fantastic crpg.

Risk of Rain!