For my part, I haven't gotten anything new yet, so if you've read my recommendations before, I apologize for any repeats. Roguelike Edition, apparently.
PlateUp! is my favorite couch coop game on Steam. You and up to three friends work together to run a restaurant. It's a little like Overcooked, but instead of having different wacky levels to get through, you choose a menu (starting with one dish), and build up your restaurant day after day. Every few days you will have to choose a new complication (like another dish or reduced customer patience). The goal is to get through 15 days of service without a single dissatisfied customer, so it's like a restaurant roguelike. It's currently 70% off and 94% Positive all time.
Dead Cells is a very fun sidescrolling roguelike that feels a bit like a Metroidvania. Collect weapons, kill monsters, die, repeat. It's currently 50% off and Overwhelmingly Positive all time.
FTL: Faster Than Light is a classic roguelike at this point. You must traverse the different sectors of the galaxy to reach and destroy the Rebel Flagship. You can order crew members around in real time, while the ship weapons take time to recharge, giving a turn-based feel. It's 70% off and Overwhelmingly Positive all time.
Noita is an amazing roguelike as well. You play a wizard attempting to explore down into the earth for treasure. Every pixel in the game is made out of a material, from plain old Dirt to flammable Oil to useful Water. Find treasure and new magic wands. Mix and match the spells on your wands to make new effects -- and even utterly broken bullshit. It's 60% off and Overwhelmingly Positive all time.
What about you? What do you recommend?
Picked up Pictoquest for like 60 cents and if you enjoy Picross its basically the perfect game for that. Its got actual punishments though and many puzzles have a timer, so if you aren't seasoned at it its probably a bad place to start.
Also picked up Cauldron, which is probably the perfect idle/incremental game ever made. The systems run surprisingly well into each other and gradually build and then synergize when they stop building, leading to the game actually evolving into other games as it goes (like the apple catch minigame turning into a full on schmup). It also just literally has Vampire Survivors inside it.
And while its a game I already had, I recommend everyone look at Siralum Ultimate. Its one of those games you can basically play for the rest of your life and never probably fully complete. Its a "creature collector" but the depth the combat goes to means its barely like any other you've ever played.
I built my team for debuffs, which means at the start of every fight I give them almost every debuff in the game which thanks to my talents means they also basically lose half their stats and take a huge chunk of damage for each debuff applied, to which I then cast my spell of "give every enemy 3 random debuffs" which I enchanted to cast twice and then I've won by simply doing nothing. And that's just one out of like 50 classes and something around 1200 unique monsters that you can build to do just about anything. If I ever get bored I can just build a team that actually attacks or does suicide bombs or heals themselves to do damage, and its a new game.