Ammunition for this weapon are generally easier to locate throughout the entire game relative to Rockets, Ammo Belts, and BFG Cells, and are particularly abundant in the EnPro facility. Individual Plasma Cells hold 25 units of projectile, whereas a box of 2 Cells holds double the amount. Ammunition comes in the form of Plasma Cells, which appear to be bulky bottles that glow a luminescent blue and possess a blue-colored tip. Similar to the Chaingun, BFG 9000 and newcomer Machine Gun, the Plasma Gun discards the game ammo HUD because it has its own ammunition counter in a small monitor located at the rear upper end of the weapon itself. The weapon fires blue plasma bursts which originates from the cells stored inside the back of the weapon. It is slightly different from its earlier counterpart, as the weapon model is based off of a futuristic modern assault rifle with a bullpup design (the weapon ammo is reloaded and ejected on the back of the weapon). The Plasma Gun in Doom 3 is an energy-based weapon first found in a hidden location in Sector 3 of the Alpha Labs. Unit is powered by plasma canisters manufactured in the EnPro facility.' ― PDA Description 'Energy based weapon developed in the Mars weapon facility.
