Baba is You - simplistic graphically, but immensely satisfying mechanically. Amazing puzzle game.

Celeste - gorgeous graphics and buttery smooth controls, a platformer that is encouraging and supportive all the way through but ranges from “easy as pie” to “hard as nails” as you progress. One of the most satisfying games to complete every level for. One of the best soundtracks ever. Trans rights!

Fez - another simple-ish at face value platformer game, but this time with puzzles as the main thread instead of action. Super satisfying puzzles and an amazing soundtrack.

Omori - an RPG which eventually deals with some heavy subject matter but does so tastefully and maturely. It’s a splendid story either way you spin it, and lots of fun.

Undertale - same as above, but shorter and more “punchy”. One of the best soundtracks in gaming, and a cast of characters you’ll come to feel like your family. It’s quite subversive for the genre, so it’s a fun experience. It has an episodic sister game Deltarune which is still in the works.

Void Stranger - a block-pushing styled game, but incredibly subversive for the genre. Gorgeous visuals, great soundtrack, and some truly mindbending puzzles. It gets super hard, but it’s also super satisfying to beat.

Stardew Valley - cozy farming game, really just oozing passion and love from the developer(s). Lots to do, many unique people to meet and things to see. Pretty graphics and stunning soundtrack. Fall in love with an NPC, marry them if you want. Or don’t do any of that. Make your own fun in this one, there’s a bunch of aspects to get into.

Citizen Sleeper - not technically 2d but may as well be. A gripping, beautiful sci-fi story, told in a tabletop RPG style. You won’t be able to help falling in love with the rag-tag character cast, and shedding a few tears along the way. It’s very down to earth but makes me long for the stars at the same time.

Ori and the Blind Forest/Ori and the Will of the Wisps - a drop dead gorgeous, lovingly crafted metroidvania with one of the best soundtracks you could ever ask for. Platforming is gorgeously refined, and the sequel improves upon the first game in many ways.

Hollow Knight - I could copy paste the majority of the Ori blurb here, however this game has a deeper focus on the deep, winding, sprawling exploration, and combat aspects. Gripping soundtrack and stunning stylised visuals. You will, however, join the wait for Silksong with the rest of us, which drives many people mad!

I liked Metroid Dread a lot. I feel like it’s a good starting point for Metroidvanias too because the game does a good job nudging you in the right direction e.g. by closing off certain areas but still letting you explore and figure out where to go. I especially enjoyed the movement, it feels very fluid and satisfying.

The only major issue I had with the game was that performance is really bad in a few encounters. Most of the time it runs fine though. It’s also not super long. I prefer a game that doesn’t overstay its welcome, but if you’re looking for something that is good value for money in terms of playtime there might be better options.

I have been playing the absolute shit out of StarSector. It’s part OG space trader, part 4X, with a great battle system and a vibrant moding scene. It’s affordable, and will run on just about anything.

Obligatory short list of great old school RPGs:

Fallout 1 & 2

Baldur’s Gate 1 & 2

Icewind Dale

Planescape Torment

(I think Neverwinter Nights belongs on the list as well, but I can’t attest to it as I’ve never played it.)

You can pick up most of them from GOG.COM for cheap.

There should be enough to keep you occupied for a while.