does anyone know a co-op steam games ???

Castle Crashers

hi,

in what style of game are you looking for?

orcs must die 2 (tower defense / action)
we are here / we are here too / tick tock (puzzle)

Sort this by rating or online (to see if the game is dead)

Portal 2, Sniper Elite V2, Project Zomboid, Call of Duty World at War, Hammerwatch, Factorio.

Heroes of Hammerwatch
Zombie Army Trilogy
Ibb & Obb
Dying Light
Renegade Ops
Castle Crashers
Divinity: Original Sin
Gauntlet
Magicka
Aragami

Should be enough to get you started, and have some good variety.

Overcooked 1 (local) / Overcooked 2 (local + online)
Alien Swarm (free, published by Valve)

Chariot is 80 percent off atm.

Go to Co-Optimus and choose PC as a platform, most are on Steam.

Resident Evil Revelations and Revelations 2 have raid modes that are pretty neato.

Borderlands 2.

shank
shank 2

Stardew Valley (just came out with co-op) I already love Single-player. Haven't tried Multi
Death Road to Canada (Had a blast playing this with my bro)
Both games can run on a potato (･ω･)つ⊂(･ω･)

Overcooked!

yes

Risk of rain 2

Magicka

some of these

For 4-players: Star Trek: Bridge Crew, Guns of Icarus, Overcooked

Rocketbirds: Hardboiled Chicken - for 2 players, ~2h local co-op campaign

Styx 2 is a great coop stealth game!

Are we talking local co-op or multiplayer? 2 players or more? Any preferred genres?

Was playing currently Resident Evil 5 and it was pretty fun :)

Sid Meier's Civilization has local hotseat, which works fine for a turn-based strategy, assuming you're not playing against each other.

I play Civ6 because it's the latest (I've had more than my fill of the previous iterations), but there's a lot of people who love Civ5 (go for the Complete Edition) which you can often get your hands on at a decent discount.

Ibb & Obb
Overcooked 1 & 2
Keep Talking and Nobody Explodes
Don't Starve Together
Portal 2