I'm planning to get either left 4 dead 2 or killing floor, which game is better in terms of co-op , dosen't get boring quickly ,like lack of levels/maps, and still has alot of people playing . Or any other good multiplayer games you know of on steam, rpg/fps etc.

Both are solid coop games. Left 4 Dead 1/2 is self-explanatory. Killing Floor can support a larger number of players though, up to six, and has unique classes and perks which makes MP quite fun.

As for other co-op FPSes, Borderlands is good fun. I can also recommend Serious Sam 1/2/3 for co-op fun.

Portal 2?
Both l4d2 and killing floor are good choice for co-op though.

This post has been edited by rikimtasu: May 29 2012, 11:21 PM

Personally, Killing Floor lasted longer compared to L4D2 for me. They are still adding maps and have events, unlike L4D2.
However I think South East Asia has issues finding KF servers.

Dungeon Defender is great game for co-op, give it a try, currently still on discount(excluding dlc).

Nah. There are abundance of TH & SG server. JP server has stable ping too.
TS, Im using broadband, to date, my ping around 150-250 ms and everything is fine.
This is not Battlefield 3

BTW, how are u going to get KF/L4D2? They arent discounted.

summer sale is near...
wait for it TS...
but its good u already start asking whats the best game in co-op now...

U can try this game -> payday: The Heist

I recommend Killing Floor if you like horror games. Very good co-op experience especially with your real life friends

sorry for necro-ing

as im going to Cyberfusion with my 3 friends, pls recommend me co-op games that:

- on steam (malas nak bukak origin/uplay lol)
- up to 4 player
- not DOTA2, Borderland 2/1.5, Payday, Killing Floor, L4D and other previously mentioned games.

- FORCED (not sure how many people for coop session)
- Gauntlet

Few multiplayers game that I love
-Lara Croft and the Guardian of Light
-Monaco what's yours is mine

Or.. You can simply use this link to view ALL co-op games on steam
STEAM CO-OP
And be sure to look for reviews so that you don't waste your money