Tomahawk

The Tomahawk is a donator weapon. It is a retextured golden axe and it always appears in your inventory except in gun game. It also doesn't work in infection if you are a zombie. The Tomahawk is thrown by right clicking where it will be launched like a bullet. On contact it is an instant kill.

How to get the Tomahawk
The Tomahawk is a donator weapon. It costs $2 (USD) and can be purchased here. Just click one of the tabs, type in your IGN (IT IS CASE SENSITIVE), click guns, then click the add to cart button next to the Tomahawk. Follow the directions to complete the purchase.

Why you should buy the Tomahawk
The reason the Tomahawk is so helpful, is that since it is an instant kill, if you have a weapon that is not good for close combat (a sniper for example), then you can quicky switch to your tomahawk, take the enemy out, and get back into the fight. It is completely optional, but it will definitely help your gameplay.