It Left 4 dead. Just play it!

This is quite fun game to play with friends.

Payday 2 is addicting first-person shooter about Bank Heists,its heavily cooperative with 4 player heists, its fun with friends if you work together.

Dirty Bomb is fast paced shooter with nice art style. It´s very fun game to play with friends.

TF2 ís really addictive and well balanced game. Well... go and play it

CS:GO is a game where you must be very sharp and alerted, you must cooperate with you teammates and be patient. I would recommend it because of teamwork

After playing this game for a while (100 hours) i can tell you that this game is best 18 bucks i have ever spend

Fun zombie game. It have quite long maps but its fun and that´s most importatnt. So give it a try.

Really great game. We at Dungeon Initiative can´t stop playing it. If you are looking for a game for playing with friends give it a try.