What is the steam game that have the best multiplayer and coope mode??

i dunno, the first thing that cames over my mind is Left 4 Dead 2

Call of Duty games, CSGO, Payday 2.

Left 4 Dead 2

Magicka's a pretty good game for multiplayer, though the netcode isn't the greatest

notepad.exe

Killing Floor - Best Coop in the world!

Counter-Strike: Source or Counter-Strike: Global Offensive. No competition. Black Ops 2 is okay but not as good.

Terraria

Infestation: Empty Wallet Stories

CS:S because of the variety.

what do you mean with funny, funny to be fun to play or funny enough that you can laugh?

Left 4 dead 2... on a 10v10 server ._. ever heard about those stories when shit goes downhill? Yea... those servers are like that

Try Crysis 2 from the humble bundle, I see you have it and you didn't even give it a chance.

It's like TF2, only you can play Spy, Heavy, Sniper all at the same time thanks to the nanosuit.

If you base the concept of multiplayer to playing with friends and working together then Payday 2.
Debatable,yes.

Saints Row the Third, Killing Floor, or Garry's Mod. /thread

Dota 2. The numbers dont lie, and the numbers are massive.

Todays numbers
Current Players - 379,261

Peak Players - 469,196

All above are wrong.

The true answer is The Ship.

CoD games I guess.I'm not a fanboy buy they have the most exciting multiplayer.Every level new items unlock and you try to complete challanges, really fun to play and a lot of things to do.

Sonic All Star Racing Transformed, me and my friends had a blast with this. It has many play modes, both single and multi player, is playable locally with up to 4 players (split screen) and online with up to 10 (maybe 8, don't remember). The only problem is finding people to play with, unless you manage to persuade your friends to buy it.

L4D2, chivalry medieval warfare, magicka

Spelunky, Monaco, Terraria, Orcs Must Die 2, Payday, Blacklight Retribution, CS:S, TF2,

Saints Row the Third or Borderlands 2. Mostly just depends how open you want it. BL2 has a story to follow with a lot of fun along the way; SR3 is simply mayhem.

Red Orchestra 1 , Mount and Blade Warband .

Garry's Mod they have modes for every thing. Building, Pvp, Football, zombies, and rpg the list goes on.

Garry's Mod, Red orchestra 2, Borderlands 1 & 2 and ArmA 2 & 3