Grim Dawn (currently playing Community Season 7! check it out @ grimdawnleague.com, Dead Cells and Terraria (and most of that time unmodded - i just love building cozy or not so cozy homes).
regarding the large download, there is a girl which is very fit and likes compression a lot which reduced the total download size to 38 gb, if that helps. also, you can reinstall from that as often as you like without redownloading.
Chained Together - running gauntlets while … chained together
Children of Morta - adorable graphics meet solid gameplay and vivid storytelling
Core Keeper - top-down Terraria with great pixel art, full release in a week!
Cosmoteer: Build your 2d-Spaceship and do what you want! Full workshop support with tons of available mods.
(hmm so much stuff starting with c, gotta change my game)
Element TD 2 - classic tower defense experience
Heavenly Bodies - Adventure game with physics!
Kingdom: Two Crowns - the right thing for chilling :-)
Necesse: even more Terraria, but with a huge world and settlements to build and manage. Still in EA, and needs polish, but great game even now!
Neon Chrome: Cyberpunk twin-stick shooter
Operation Tango: Asymmetric Coop, one is a hacker, the other is the agent on the ground
Streets of Rogue: “immersive sim”-top down twin stick action roguelite - i cant even describe it well, but it is heaps of fun and chaos can pop up around every corner!
Synthetic: twin-stick shooter with tons of guns and a hefty difficulty later on
Grim Dawn: ARPG, and one of the best in its class. Dated, but still updated (and gets a new expansion soon-ish!). community is running seasons which add new areas, items and whatnot! i’ve sunk 1500 hours into that one, so i am probably biased when i say give it a whirl.
Metroidvania with roguelike elements and metaprogression. Graphics are timeless (the game plays inside of a comic book, which is a nice change), very tight gameplay, tons of weapons and cool bosses.
Spiritual successor to DoomRL. a turnbased roguelike that doesn’t feel turnbased, with smooth animation and fast gameplay. 3 different classes with a lot of gamechanging perks, tons of guns and heaps of demons, what else could someone want?
The Ascent: Cyberpunk Action RPG, nice action and story, single/coop.
Star Valor: Top-Down Action space. not so much story wise, but great gameplay, costumisation, fleets, and the upcoming addon will add station building and (more) faction warfare.
Weird West: from the Arkane Austin crew (Prey 2016, Dishonored). Good story, immersive gameplay, and a innovative world. It’s 3rd person, but there is a mod which makes it 1st person!
Mortal Sin: Roguelike Melee-FPS. lots of fun, and the dev just replaced the level generation completely, adding verticality and much more variety.
Golden light: another Roguelike FPS, its on the weird side, but a lot to explore, had a lot of fun with that one!
Hardspace: Shipbreaker: scrapping spaceships in zero-g has never been more fun! good storyline highlighting the plight of workers in an inhumane system, and what they can do about it.
Red Faction: Guerilla: Older game, Open world is a bit bland, but the realtime destruction of large buildings with explosives will never get old
and if you haven’t played it yet: the System Shock Remake is an absolute joy to play.
My current FPS fix is Deadlink: another roguelike FPS, very tight gunplay and movement, good looking too.
if you can give a few examples what games you enjoyed, i can probably point you in the right direction… i think i have a slight game collecting problem with a few thousand titles, but at least i can help people like you out lol