Seriously, It's Left 4 Dead 2. It is not only a classic, but still one of the best 4-player co-op games created. Add Workshop mods, maps, skins, and extra content, as well as it dropping to 99 CENTS EVERY SINGLE SALE, there is no reason to not have it.

Oh, and it has ALL the content from Left 4 Dead 1, plus the extra DLC campaigns, and.... Just hit buy

Seriously, It's Left 4 Dead 2. It is not only a classic, but still one of the best 4-player co-op games created. Add Workshop mods, maps, skins, and extra content, as well as it dropping to 99 CENTS EVERY SINGLE SALE, there is no reason to not have it. Oh, and it has ALL the content from Left 4 Dead 1, plus the extra DLC campaigns, and.... Just hit buy