Chainsaw

The chainsaw is a short range melee weapon and will kill others very quickly if used right.

Many players use the chainsaw method, when near a portal. Camping near a portal while holding the chainsaw will help a lot if an enemy teleports to you through the portal.

Strategies:
Against The Chainsaw: If you are fighting against a chainsaw player, its NOT a good idea to stay in one place, so make your movements unpredictable, and it is recomended to use a spread weapon like Lasergun as Chainsaw players will more than likely be running around like maniacs.

Using The Chainsaw: The Chainsaw Is a melee weapon, as such, you should move quick and sporadically. Get your enemy to waste bullets, then go in for the kill.

Trivia:

 * The Chainsaw is one of two weapons that are considered "Melee", the other being Fists
 * It is possible to dash forward with the chainsaw to great effect, by laying down (or proning) and right-clicking (or flying) while revving the chainsaw (left click). this is tricky, but will cause a dramatic increase in speed.
 * The Chainsaw bears a resemblance to the chainsaw used by Leatherface in the cult classic film The Texas Chainsaw Massacre