Beware though: crawlers will simply expire on their own after awhile. A round won't end until ALL zombies are put down, so make your adorable, little crawler and then run around re-upping your ammo, buying new weapons and opening doors without the hassle of a pursuing horde. Creating a crawler and keeping it alive at the end of a round is an invaluable strategy they're slow, the slowest enemy in the game, and easily avoided. 'Crawler' refers to a still-functioning zombie who has had his legs blown off by an explosive blast (not to be confused with the gas-spewing Nova zombies in 'Black Ops' which do, in fact, crawl). Downed zombies will sometimes drop power-ups, but only if they've breached what you're looking for in the early going is a x2 point boost. During the early rounds when your knife is still a valuable weapon, position yourself so you can cover one or more windows and let them come. If you plan it right however, a breach can be a good thing. One of the scariest words you can hear over your headset when playing Zombies is 'Breach!' The zombies have broken through one or more barriers and are now streaming into the relative safety of your play area.

To maximize your points, put 6 pistol bullets into each zombie BEFORE knifing it into re-death.

First-round zombies go down with one knife swipe, second-round zombies with two, and so on. Rely on your trusty knife melee attack instead. Feel free to pick one up, but don't bother using it until round three or four. All players start with a pistol and 500 points to spend, enough on either map to buy a rifle or a shotgun. Much of the tension in Zombies comes from having to manage your limited resources. The more eyes you've got, the better the chances of preventing or plugging those zombie breaches before they get out of hand. So make sure you've got at least one friend to bring along into your match, preferably two or three. If zombie movies have taught us anything, it's that going it alone is a very, VERY bad idea. GENERAL TIPS FOR SURVIVING THE ZOMBIE HORDES What follows are some general strategies for surviving the onslaught as well as map-specific tips for the two new areas featured in 'Black Ops.' This guide is for those who are just starting out with Zombies and want a little bit of an extra edge. As anyone who embraced the mode in 'World at War' knows however, if you start a Zombies match without a rough strategy for survival in your head, making it to double-digit rounds becomes a remote possibility. Treyarch brought back their much-loved zombie survival mode from 2008's 'Call of Duty: World at War' for their just-released latest entry in the series, 'Black Ops.' For a first-time player, the rules seem simple enough: gun down wave after wave of the walking dead through a series of barriers, fixing entry points as needed and doing your best not to end the day passing through whatever functions as a digestive tract in an animated corpse.

Black ops 1 zombies