Chainsaw (Doom 2016)

The chainsaw returns in the 2016 reboot of Doom as a brutal melee weapon, now for the first time featuring the ability to completely dismember, decapitate, and cut directly through enemies. It features a dramatic appearance with a sharp, blade-like metallic chain guard, has a chain studded with savage razors, and harkens back to the original design with a bright yellow coloration. It is a forbidden black market item at the Argent facility due to its lack of practical uses on Mars and an apparent attraction it possesses to people intending to do sadistic damage. As such, it was subject to confiscation by UAC security before the facility was invaded by the forces of Hell.

Upgrades

 * Super chainsaw
 * It is currently unknown if the "super chainsaw" is the base form of the weapon, or a more powerful upgrade over the normal chainsaw. The Super chainsaw was used in the E3 game play footage.

Speculation
An apparently incompletely coded ammo counter appeared on the HUD during the demonstration which displayed a static number 6 while the super chainsaw was in use. It has been speculated variously that this may be meant to eventually serve as the maximum number of uses of the weapon altogether (before it would ostensibly run out of fuel, for example), or the maximum number of glory kills that the weapon can perform before it reverts to a less powerful form.