Gaming

Firewatch - recommend you wait for a sale but its a great story game that is on steam and gog and even native Linux

tabletop simulator - tons of card and board games that you can play with your friends if it exists it might be ported has native Linux

golf with your friends - great mini golf game to play with your friends similar to tower unite golf but better has native port

american/europe truck simulator - trucking game that real truckers say is the most realistic trucking game and they try to help with all issues and is even native Linux

https://store.steampowered.com/app/1641020/my_brother_lives_in_a_canyon - my brother lives in a canyon - great story game that is made by one person and it does not take long

Bloons tower defence 6 - tower defence game where you pop the bloons to defend your base

Road 96 was really fun and the soundtrack was great.

Lost Pig And Place Under Ground

An old-fashioned text adventure, one of the best ones I've played.

Pig lost! Boss say that it Grunk fault. Say Grunk forget about closing gate. Maybe boss right. Grunk not remember forgetting, but maybe Grunk just forget. Boss say Grunk go find pig, bring it back. Him say, if Grunk not bring back pig, not bring back Grunk either. Grunk like working at pig farm, so now Grunk need find pig.

Check it out

Ring Runner: Flight of the Sages is a 2D top-down space shooter with RPG text-adventure elements outside of the combat scenarios. I found it a super fun game with an insane amount of content. Probably over a hundred hours worth. There's a bunch of weapon and defense customization when it comes to combat, and there's probably thousands of varieties of ship you can build for whatever duty you need it to do.

If you like MOBAs or MMOs you'll also probably enjoy this game, because when customizing a ship you can choose which key on your keyboard to bind the weapon to, and towards the end of the game you'll end up with a whole row of keybindings on your keyboard.

I believe if you play with a controller it has twin-stick controls, but on PC the controls are more like Elite: Dangerous or No Man's Sky, just in a 2D environment.

If you enjoy city builder games you might wanna try Songs of Syx out. You basically build an empire containing potentially thousands of citizens. There’s no way I could possibly do the game justice in a comment, so you might wanna check out a let’s play or the Steam page

Owlboy was better than I expected it to be.

Narita Boy is a really cool glitch aesthetic sidescroller

I can't really recommend this because its more or less a dead multiplayer beta that's not even legitimately available anymore but Shattered Horizons was a microgravity first person shooter that was really cool. So, uh, if there are any indie devs in this chat, uh, please steal this dead idea!

Kenshi - a brutal, and sometimes janky squad free roaming game. I have far too many hours in that.
Pulsar - Lost Colony - Fun game if you have a few friends around. Pretend to be Captain Kirk - except chaos.
Rimworld -- Dwarf Fortress lite
Dwarf Fortress - Grand daddy inspiration for most other games
Torchlight - Diablo
Project Zomboid - All your top down zombie hunting dreams come true
Carrier Command - Drone carrier warfare
Nebulous Fleet Command - The Expanse.

Does X4 count as Indie?

Here is a good one

recently got completely addicted to a text-based Indie RPG called Roadwarden. The story and characters are incredibly rich and the gameplay is full of satisfying little moments of "oh, I have just the item for this!" or "another character told me this tavern keep doesn't appreciate jokes; I better get straight to business". I haven't beaten it yet, but I can't wait to see where it leads!

Superflight

Really engaging game with a short, easy to understand mechanic. It's fun just to put on and fly around for a bit every now and then.

Gunpoint

S.P.A.Z.

Eufloria

Astroneer

Manifold Garden

Massive Chalice

The Pedestrian

Solar 2

Snakepass

Stacking

I’ll say CrossCode. 2D hack-and-slash set in a futuristic MMO. Way too good, way too unknown for the genre that it is.

Ooh, I love finding obscure indies. There are an awful lot of games on Steam and Itch and other platforms that are amazing experiences, but that almost no one has ever played or even heard of for one reason or another.

One of my recent favourite zero-budget indies is Sally Can't Sleep, a strange first person platformer with a lot of focus on fun, versatile, and exploitable movement mechanics. The dev sacrificed visual polish for quantity and style, so the game has a lot of interconnected levels with a big variety of different mechanics and visual styles - it's a really good example of how much a solo developer can accomplish.

Another one is Worlds, which is a 3D stealth-shooter-platformer-adventure? I like it for the same reason as Sally Can't Sleep, it's ambitious and creative, and you can really feel the developer pushing against their limitations to release something that punches far above its own weight.

Also, both these games are very cheap, even at full price!

I'd personally recommend Rain World. It has a reputation for being pretty hard, and you'll probably die a lot so you have to approach this game with patience

The Westport Independent is a censorship simulator, in which you play as the editor of a newspaper, choosing which stories to run and how to edit them in order to avoid angering both the authoritarian government and political radicals who want to take them down, while also appeasing your journalists, who may get angry and quit if you censor their stories too much.

A bunch of my favorites have already been listed, so I'll just mention the one that wasn't: Antichamber, a first person puzzle game that's probably somewhat like Portal in terms of how it requires you to rethink your assumptions about how space works, but it's a very different game, both mechanically and in tone. I don't want to give away too much, but it's a mix of weirdly unsettling elements (although it is by no means a horror game), a design that's actively trolling you in ways that will make you laugh, and mechanics revelations that will have you scream "Wait, I could have done that this whole time?!" It's one of those games that I wish I could delete from my memory and play for the first time again.

Hyper Light Drifter is a really pretty game with tight controls, fair difficulty, excellent music, and some of the best atmosphere of any game I've played.