Occasionally in multiplayer the pathfinding breaks and the character bounces off obstacles. I have also found a few areas of the map that show a shed wall. people are also moving outside the map boundaries. I also encountered 1 zombie killing me through a wall and another that was invincible both times it only happened once and both time I had just tossed a grenade. last thing in settings it says redemption code but no codes exist online except the hack codes.