Here is a list of the games that were mentioned on this thread (there may be duplicates and some may be missing)

Lunacid

STALKER

tenchu z

The battle for Polytopia

Gemcraft

Hardspace Shipbreaker

Oni

Tales of Maj Eyal

Crystal Project

Sundered

Teleglitch

Rhythm Doctor

Escape from Tarkov

One Step From Eden

Dyson Sphere Program

Shapez.io

Vagante

Awesomenauts

Transistor

Days Gone

Noita

The 2008 Prince of Persia

Broforce

playingMe

My Shadow

Little fighter series

Age of Mythology

Evoland 2

Lenna’s Inception

Bastion

Snowrunner

Exanima

Lunacid

Praey for the Gods

The Upturned

Withering Rooms

Your Spider

Valheim

Metal Gear Solid 5

Final Fantasy XV

Rimworld

The long drive

Zomboid

Haunt the House: Terrortown

Nihon Falcom

Cataclysm: Dark Days Ahead

EV Nova

Nova Drift

Stacklands

Gurumin: A Monstrous Adventure

DmC

original Octopath Traveler

Triangle Strategy

Star Realms digital

Genshin Impact

Factorio

Factorio. Sure, it’s universally hailed as a great game, but I still call that underrated. Yes, I’m a cracktorio addict, how did you know?

Noita never reached the levels of fame and notoriety that it deserves. It should be mentioned in every “Best Roguelike” game list.

Now, it’s definitely rated high by those who play it, with Overwhelmingly Positive reviews, but it never got its mainstream spotlight.

I really love the whole presentation and much of the gameplay of the “2D in 3D” games such as the original Octopath Traveler (haven’t played 2 yet) and Triangle Strategy. Triangle Strategy especially really brought a lot to the strategy RPG table (generally my favorite genre) and I’m surprised at how little it was talked about even if it was well regarded and sold out of almost all my local game retailers from pre-orders alone on launch day (though that could have also been those game shops not ordering many copies thinking it wouldn’t sell well).

Nova Drift, I just can´t stop playing it. It is a roguelite space shooter, based on Asteroids. The game has stylish 2D visuals, huge number of builds, responsive and precise controls, plus a nice dev, who listens to the community. It happens to be on sale right now too.

Tales of Maj Eyal is a roguelike that is on the scale of an epic adventure rather than a single dungeon delve. It has some of the most unique class design I’ve seen in a game. It has great automation features that let you set trigger conditions for skills. The game has received persistent updates for over a decade now.

Crystal Project is a relatively new JRPG that features some of the best exploration I’ve ever seen in a game. Also like ToME it has interesting class design. The end game bosses are fun, and actually make you think about your team design, they are generally not brute forceable.

Both games are well received but have less than 10k reviews on Steam, where indie darlings such as Cuphead or Hades have over 100k.

Teleglitch: it’s a top down sci Fi horror roguelite which has purposely poor graphics that are compensated by a great story and ambiance.

It’s one of my favorite games that nobody has ever heard of

Hardspace Shipbreaker. You’re a wage slave in an orbital junkyard breaking down ships and recycling them… with lasers. They’re essentially a puzzle game in 3d, because you have to break the ship parts into their respective bins, but they’re all stuck together in weird ways that explode if you do it wrong! The soundtrack is so good (Americana blues, Lotta banjo) that I got it on vinyl.

STALKER - Or at least in North America, anyway. While the vanilla games can be a little clunky and difficult at times, they offer one of the most unsettling and atmospheric experiences around.

There is nothing quite like tucking your tail between your legs and hurrying back to the safety of numbers, or a lonely campfire after realizing the sun is rapidly setting and you’re still out there with the shadows. Once you reach that camp or relative safety, there is this strange, mixed feeling of simultaneous security and insecurity as you listen to your temporary companions converse with each other in the glow of a crackling fire in a decaying village or industrial lot, while distant creatures howl in the night, and the Zone itself creaks and groans around you like great metal in the sky.

Those feelings are intensified when conversation abruptly halts and the men around you go on alert, and you remember that nothing stopping those things in the night from wandering right into your camp, or whether/whoever that distant flickering flashlight belongs to from getting a little too close.

And then there is that feeling that follows, after the sun finally rises and you head back out into the strange, abandoned beauty of the world. Never completely safe, always on the edge, but a little more confident after having survived another haunting night in the Zone.

Sundered, specifically eldritch edition. It is a great metroidvania with an eldritch twist!

Shapez.io If you love Factorio. Try Shapez.io, a game where you build factories to make shapes.

Awesomenauts

It’s a 3v3 2D platformer lane-pusher with an art style reminiscent of a saturday-morning cartoon. The upgrade system is very simple compared to other lane-pushers, and the games tend to go a lot quicker (15-25 minutes.) It’s very intuitive to get into, but still has room for a lot of expression of skill.

Unfortunately Ronimo (the company who made it) went bankrupt in late August, so the matchmaking server went down in September; but recently Atari bought the rights to the IP, so it’s possible it will come back soon.

Gurumin: A Monstrous Adventure.

It’s a very cute action RPG made by the developers of the Ys and Trails series.

Evoland 2: A game paying homage to the history of rpgs, and has a fairly solid set of main characters.

Lenna’s Inception: A 2D Zelda clone about the world glitching out and you taking the place of the main character.

Bastion: First game from Supergiant Games (makers of Hades). Fantastic music and voice acting. Fairly good story too.

Metal Gear Solid 5: I wish there were more cutscenes and less repeated content, but the core gameplay was amazing and unique.

Final Fantasy XV, yes it was obviously unfinished but it had a great atmosphere and exploring the world was nice.