Green infantry: These are the lowest levels who have no skill at all, except for some lucky shots sometimes. Yowever, a group of them may prove a bit annoying with the corresponding increase in hit chances.

Red infantry: They almost never miss, even on dive shots and rush attacks. However, they only require one shot to kill.

Orange infantry: They have health meters, which is quite a bit irritating, but they barely hit you. Make sure to duck sometimes; the closer they are, the more fatal they get.

Yellow Supply Troops: One hit kill, and weak. Shoot them as much as you can. They drop more weapons that way. Watch out, they aim better than the green infantry types.

Blue Special infantry: The ones with flamethrowers can be trouble and they have life bars. Get in the way of the flame, and you will lose a life. The ones with rocket launchers are a one hit kill, but are as intimidating as they get. They do not have 100% accuracy or life bars. Axe throwing and grenade types are quick and sometimes too close to dodge. They may sometimes blend into the background, looking like the wall or other infantries. However, they can be killed in one shot and you do not always have to duck. Even though they always hit you if you do nothing, shooting the object they throw is another solution.

Clawman and Nightmares: They pop out of nowhere and will never miss. They also have life bars and can do triple backflips. Take cover when you see one.