They're ugly. They're stupid. They're weak. They're so unfriendly that they can't even get along with each other. Unfortunately, there are a lot of them, and they're all out to get you! You managed to get stuck in an anti-aircraft bunker in a strategic area, without any troop reinforcements. You know that the enemy is going to be coming in droves, so you're glad that you have a huge supply of ammo to defend yourself.