Left 4 Dead 2
I'm pretty sure most have heard of this game, it's a CO-OP zombie game made by Valve
Left 4 Dead 2 Multiplayer Playthrough / Gameplay Part 2 Dark Carnival Ellis Full HD 1080 – 1:03:59
I often play this game so if you want to have some fun, here is my ID https://steamcommunity.com/id/blizz999
Kasimir, Vinnie and I were playing the RE2 senario A gamemode the other day.