They are pretty much the same with different speed and health attributes. These are the guys you encounter the most.
These zombies crawl on ground and start to spawn once you have turned on the power. They explode when they come in contact with Nova Gas hence called Gas Zombies.
They are specific to Kino Der Toten, they are the dog zombies. Not much of a worry, spray and kill.
1# Avoid Contact
Don’t try to run past zombies when they are chasing you unless you have jugger-nog. You would multiple hits if came in contact, and can easily be downed. Don’t get yourself surrounded by zombies; keep a safe distance.
2# Repair and Repair Consistently
Don’t leave any barricade open and repair as soon as one is broken. You never know, when you get busy fighting a horde just to be hit from behind by a zombie entering from the broken barricade. You can repair even when you fighting zombies, you just need to have the interact button pressed.
3# Leave Two Zombies in the End
Things are different in Call of Duty: Black Ops. Now, instead of leaving one zombie at the very end of the level. Leave two zombies to repair all the broken barricades and buy weapons. If you leave one zombie it would become too fast and you may have to kill em. Or you can opt to make it crawler but even then it would be fast enough to harm you.
4# Let Zombies Go Past Barricades If You Want Power Ups
Zombies drop power ups but not, unless they are allowed to go past the barricades. So, whenever you feel the need of random power up, let few pass the barricade and kill them to get power ups.
5# Weapons of Choice
Find any weapon you like off a wall, make sure you have any good enough that you buy off a wall when needed. Wall weapons are the only guns always available to you. So, you need something off wall that you are comfortable with. If you want to know which one you prefer the most; experiment.
6# Max Ammo and Insta Kill
First off, before you pick up max ammo; reload. When you have insta kill, don’t waste ammo of your primary weapon, use your secondary weapon.
7# Communicate and Listen to the Sound
If you playing with your team, communicate and get your coordination going. Don’t make lot of noise on team chat though or you can miss the zombie sneaking behind you.
8# Leave an Exit
Always have a teleporter exit waiting for you if and when needed. That would really help you when overwhelmed with zombies.
9# Plan your strategy and change accordingly
Don’t stick to one strategy, plan and change it a bit. Keep the Game AI confused, if you can.
10# Running is Good
Always be on the run, don’t stay at one spot far too long to get cornered.