Tactical Breach Wizards

It's made by the Developer who made Gunpoint and Heat Signature (also amazing games if you somehow haven't heard of them BTW).

It's a turn based tactics/puzzle game where you command a squad of wizards with different magical abilities to dispatch a room full of enemies. A bit like Into the Breach but hand crafted scenarios, not procedurally generated.

It also has a fun story, character customisation, and ability unlocks. Almost every scenario has a bunch of optional extra goals, so you decide how hard you want to wreck your brain. Highly recommend it!

Edit: It seems people are aware of this one, I really thought it was a bit niche.

AAAAXY. AAAAXY is a nonlinear 2D puzzle platformer taking place in impossible spaces. You can take a walk on a Möbius strip, try to find the platform with your train at the train station, and play a piano that makes the Shepard tone. It will be a bit confusing at first, but I promise it will eventually get fun.

It's not on Steam, but it's available for download on the website for free. Linux, Windows, macOS, Android, and iOS. Also on F-Droid and FlatHub. give it a try im begging you

Megabyte Punch is a side scrolling fighting game where you build your robot with different parts salvaged from fought robots that give you different abilities and powerups.

It is a super fast, casual game that you can bang out in a few nights. It has a pretty good electronic soundtrack, boss fights feel weighty even if they are relatively simple.

One of my favorite games as far as just fun and de-stressing!

Uplink

A classic from Introversion. It's a bit older so it's gotten over the review threshold by now, but I'd wager it's relatively unknown.

Hoplite (puzzley turn-based mobile roguelike). Here's a review I found: https://toucharcade.com/2014/01/08/hoplite-review/

I don't like mobile games, but this one is really elegant. It respects you as a customer, unlike a lot of mobile games.

Haven't played in a while, but I really enjoyed it a few years ago.

Crab Champions is a fast paced PvE shooter with roguelike elements. You basically are a crab and fight through multiple waves of enimies. You collect loot to become stronger, and there are fun boss fights. It supports co-op multiplayer, and is made by a single indie developer.

https://store.steampowered.com/app/774801/Crab_Champions/

Linux compatibility is great: https://www.protondb.com/app/774801

Severed Steel. F.E.A.R. meets Tron, plus a Mega Man arm cannon, plus the movement out of Titanfall. It's incredibly fun and satisfying to play, and it has an exceptional soundtrack (if you like synth).

Steam page: https://store.steampowered.com/app/1227690/Severed_Steel/

Soundtrack: https://store.steampowered.com/app/1754220/Severed_Steel_Soundtrack/

Hidden and Dangerous

Only H&D2 is on steam

The original was fantastic and v2 built on that. Fantastic 3rd person WW2 tactical shooter. Haven't seen anything like it in over 20 years since.

Mobmania https://store.steampowered.com/app/2099220/Mobmania/

It's an Bullet Heaven game like Vampire Survivor. You can play online with up to 4 Friends and every Character has it's own Skills. The Game is still in Early Access but it gets Updates regularly.

I don't have any suggestions but I do like this prompt and I see a lot of games I've never heard of

Ooh, I'll play.

Final Profit: A Shop RPG is an RPG about a deposed elf queen who opens a humble shop and slowly advances through the ranks of the Bureau of Business with the eventual goal of defeating Capitalism from within. It's unique. It has some incremental game like mechanics, and can get a little repetitive in the mid-game, but it has a surprisingly compelling story and a lot of unfolding mechanics that keep it interesting all the way through.

Roughly a 30 hour playthrough with many endings, NG+ and some optional challenge modes that remove or change some of the most obvious strategies for advancement, so if you finish it and still want more, you can play through again with a somewhat different experience.

Iron Lung. Everyone is gone. Every star, every planet and every moon. The only people left are those who were on spaceships and stations. With one exception: A moon is found, glowing in the light of a star that doesn’t exist and filled with an ocean of blood. Desperate for answers, the new makeshift government sends prisoners in submarines deep into this ocean with a simple task: make it to a hand full of coordinates, take the pictures and make it out alive. Did I mention it’s an ocean of human blood?

This game fucked me up that one night I played it alone. And no, it won’t take you longer. The dev literally says so in the description. About an hour. But it’s cheap and takes you on a crazy ride. By David Szymanski, the mad genius behind Dusk.

Avorion - In which you command and build a spaceship designed by yourself (or others on the internet). Soon you have AIs you command and space stations you own. The game allows you to lean as much or as little as you want into the fleet command and economy aspects. If you want, you can just pilot one big-ass ship and do it all alone.

Sproggiwood

Rouge like turn based dungeon crawler. Certainly not new by any means, but still a pretty decent little dungeon crawler. The art is cute and the game is pretty simple to pick up, which makes it perfect for more casual play. That said if you're a completionist, it can get a bit repetitive, but nothing too hair-pulling. Probably not worth the full sticker price, but historic sales have knocked it down to $1.49, which is a nice balance between cheap and fun (took me about 28 hours to 100%).

ECHO (2017)! It's an indie game with AAA-feeling production quality from a tiny Danish studio that sadly went bankrupt after the game only sold a few thousand copies. I played it during lockdown on an old recommendation from MetaFilter and it has since become one of my favorite hidden gem titles.

Trailer

You play a bounty hunter named En (voiced by Game of Thrones star Rose Leslie) who wakes from hibernation when her spaceship arrives at a legendary artificial planet said to hold the secret to resurrection and eternal life. When she arrives on the surface, she soon discovers that its interior is a vast, abandoned baroque Palace, straight through to the core. As she wanders the infinite halls guided by her witheringly sarcastic AI London (voiced by Nicholas Boulton), she is surprised to find the Palace generates hostile clones of herself that hunt her down and copy her actions in a unique spin on the stealth genre. Gameplay consists of trying to navigate through various beautiful, byzantine concourses, collecting artifacts and unlocking elevators that lead deeper into the secret at the heart of the planet.

You may or may not enjoy this based on how you feel about stealth games with minimalist combat, but for me the challenging adaptive gameplay combined with the evocative score, compelling voice acting, intriguing story, and gorgeous environmental/sound/UI design made this a really nice surprise. (And while the studio might be dead, I'm really hoping the plans to turn it into a movie eventually rise from development hell.)

We Who Are About To Die

https://store.steampowered.com/app/973230/We_Who_Are_About_To_Die/

Physics based Gladiator roguelike. Work your way up, start fighting with boards dressed in rags in city crossroads for the amusement of peasants, and end a God of Blood fighting in gold in the Coliseum!

Or die along the way. You'll die a lot along the way :)

Severed Steel is a single-player FPS featuring a fluid stunt system, destructible voxel environments, loads of bullet time, and a unique one-armed protagonist. It's you, your trigger finger, and a steel-toed boot against a superstructure full of bad guys. Chain together wall runs, dives, flips, and slides to take every last enemy down.

SteamDB | ProtonDB

Sanctum (and its sequel Sanctum 2)

It’s a tower defense where you also have guns and go fight alongside your towers as a first person shooter.

Both Sanctum and Sanctum 2 are worth playing and have slightly different vibes. Sanctum 1 is simpler while Sanctum 2 has more complex build crafting. Also Sanctum uses a square grid while Sanctum 2 uses a hexagonal grid, and Sanctum 2 has some tweaked enemy mechanics, including enemies that target destroy the towers or killing the players over just going for the core. I think Sanctum 2 tries to make the player feel more important instead of the towers being the main focus.

From the depths for me is a vehicle building game that's targeted to whoever likes tuning little systems. Haven't seen anyone know of it besides in the community itself. It's a bit like toying around with Lego technic. There's also quite a few more obscure versions of it, but I put this one out because I like it best.

The Last Sovereign (NSFW) is an 18+ RPGmaker game. The basic premise is this: What if you had a setting with a bunch of hentai tropes lumped together and played straight, with no porn logic or stupid characters?

You play as a middle aged, very competent army veteran who gains the powers of an incubus, and reluctantly uses them with the aim of making the world a better place, slowly developing a harem of well realized, cool characters along the way. There's sex scenes, obviously, but you very quickly forget all about them as you are plunged into an underdog story where you have to manage your fledgling armies + resources and have to constantly make tough decisions.