The AI in Perfect Dark Zero is above average and knows its surroundings well. They often will take cover behind whatever is available and pop out to shoot a few quick rounds in your direction before heading back to safety. When you are faced with multiple enemies, some will take cover while others will attempt to flush you out by flanking you. Additionally, the enemies can see when you reload and will notify their friends that you are "out of ammo" and rush your position. This unique mix of stealth, strategy and action works quite well and makes for a very fun and enjoyable playing experience. The game balances these nicely, and each mission offers a good combination of the three.