There are times when the robot people might try to flank you. When there are a lot of them around you, you can use the slo-mo move to take them all out very quickly. Most of the time when you try to use grenades, the enemies will just run away from the bomb. These robot guys are really smart. Pick up as many health med-kits as you can. Yes. You can have more than one at a time. That way when you are under attack, you just have to push triangle to use the med-kit to restore most of your health. Don't use your falshlight unless you are in a very dark room/hallway, because the flashlight battery goes out really quickly. That and the enemies can easilly spot you.