The AI teammates (computer teammates) are sometimes completly useless. i was doing survival on plantation, and go pounced by a hunter the other two AI team mates were down and nick was standing there, in looking around for a good 20 seconds while there were at least 10 zombies attacking each of the 3 suvivors. also one time on bus depot while doing survival a jockey jumped on me and managed to pass all 3 of my team mates while there were no common infected around us at all and i managed to die. and also on many occaisons when i am incapated by a special infected they will not shoot it from at least 10 meters they HAVE to walk over, wasting my health and valuable time. I also one time i had 5 health left until i was going to die, and ellis had the last health pack, he had around 40 health and everybody else had green so he decided to heal himself. i eventually got down to 1 health and STILL managed to survive despite the stinge-nys of ellis. i generly find he is stingy with health packs. Also on survival they NEVER heal them selfs. i always find it is my job to heal them. Also if a AI is incaped i always find it is my duty to revive them. Sorry for the rant but im just annoyed with left 4 dead AI
Don't even get me started. Me and 2 friends were playing Dark Carnival and the AI is the most useless I have ever seen anyone in a video game.