User blog comment:Lasifer/The Minecraft Mobs vs The Left 4 Dead Infected/@comment-4869707-20120324223603/@comment-3189283-20120324223853

The infected have to work together in order to take down thier prey and using teamwork takes alot of intelligence. The LFD zombies can also kill people and the entirety of LFD1 is set at night so the infected can also attack and kill in the dark.