Razor

Overview:
The Razor is a slow-moving zombie of major threat. The Razor's name comes from the massive buzzsaw he wields, which makes a distinct engine noise that can be heard from a distance. The Razor is incredibly lethal in the right scenarios, so your ability to survive against him is entirely dependent on your knowledge of the Razor's abilities.

Abilities:

 * The Razor's buzzsaw deals much more damage than an energy sword, and has slightly more range.
 * The Razor can charge forward by pressing Mouse 2 with his saw drawn. This charge attack deals massive damage!

Playing as:

 * As a Razor, your charge ability will lock you into moving in a straight line until you either hit a wall, or hit a player. Hitting a player will deal 100 damage, but hitting a wall will deal 20 self-inflicted damage. Try to charge when players are in a narrow corridor, and thus cannot avoid your attack.
 * Your Buzzsaw doesn't get the damage boost from blood rush, so try to use your sword when blood rush is active.
 * Your saw makes a distinct noise while it is drawn, try keeping it unequipped while on the move to catch humans off-guard.

Playing against:

 * The Razor isn't nearly as deadly when you are in an open space where you can strafe around his charge attack.
 * When the Razor starts a charge, he will make a distorted laugh and be stuck in place for a moment. This will give you some time to react.
 * When a Razor spawns, avoid sticking around in narrow corridors or other tight spaces where you can't avoid his charge attack.

Trivia:

 * The Razor is the only zombie to have a melee weapon other than the Energy Sword.
 * The Razor is the fastest moving zombie when he is charging.
 * The Razor's saw has more range than an Energy Sword, even though visibly the Sword's blades reach further than the saw's blade.
 * The Razor's charge ability was originally planned for a separate special zombie that used a riot shield. This was changed, since the point of the riot shield zombie was to defend his teammates, and charging away from them would leave them defenseless.
 * The Razor's charge used to enable the Razor to "fly" via a glitch, allowing him to skip areas of certain maps and reach humans quicker, or even out-of-bounds areas.