This article is about the video game series, and covers weapons appearing in the released titles Doom, Doom 2, The Ultimate Doom, Final Doom and Doom 64. For the 2005 live-action adaptation, see Doom.
Doom is a 1993 videogame released for the PC and later for a variety of other systems by id Software. A spiritual successor to the earlier Wolfenstein 3D, it represented a radical leap forward in technology, with an advanced engine which could handle non-orthagonal walls and pseudo-3D effects such as stairs and elevators.
The following weapons appear in the video games of the classic Doom franchise:
Doom was followed by a series of sequels/modifications using the same set of weapons; Doom 2 in 1994 was a major engine update and as well as featuring new monsters featured a new weapon, the "Super Shotgun." This was followed by The Ultimate Doom in 1995 (a simple expansion of the original title) and Final Doom in 1996. In 1997 Doom 64 was released as the last entry in the original franchise as an exclusive title for the Nintendo 64 (Although it would later receive an official port in 2020 for the PlayStation 4, Xbox One, Nintendo Switch and PC), featuring an entirely new campaign, overhauled graphics and art assets, and both new and modified weapons and enemies.
Given that the majority of these titles feature the same graphics, and that the last features little in the way of firearms in general this article will all such be all of the games that can be considered to be a part of the classic Doom library.
Doom used a process of photographic digitization to create most of the sprites used in the game; monsters were created from latex, while the weapons were toy guns and cap-firing replicas bought from the local Toys "R" Us. In many ways this is would be similar to later games using photographs of either real or replica firearms to texture 3D modeled weapons. If the toy or replica is known, then that will likely be referenced. However, given the number of weapons in the Doom games that aren't even meant to be firearms, this page will for the most part layout only the weapons tha are actually firearms in-universe. For weapons such as the Plasma Rifle or BFG9000 see the talk page for information.
Weapons
Pistols
Beretta 92FS
The "Pistol" in the first three Doom titles is a Beretta 92FS, as evident from the general shape of the top of the gun. According to game designer John Romero, the pistol was created from photographs of a bright orange water pistol that was modeled after a Beretta and that was then painted black before it was photographed. The pistol is one of the weakest of the game's weapons, and isn't very useful after obtaining virtually any other weapon.
Desert Eagle Mark I
Doom 64 swapped out the Beretta styled pistol for a Desert Eagle of some kind, likely a Mark I model, and is mostly identifiable from the shape of the back of the slide and the hammer, the shape of the rear sight, and the contours of the barrel. Although the digital pixelation makes it hard to pick out details for a specific make, most notably the safety, while visible, is not altogether identifiable, making an accurate classification difficult.
Shotguns
"Shotgun" (Tootsie-Toy "Dakota" cap gun)
One of the earliest available weapons in any Doom title is its famous pump-action shotgun. However, rather than being based on a real firearm design, the gun is made up of photographs of a Tootsie-Toy "Dakota" cap gun, a popular type of toy gun that was made from the 1980s to the 1990s and is not based on any particular real-world firearm. Doom 64 introduced new sprites for the shotgun, seemingly based on an entirely different gun. However, the exact model, if it is indeed based on anything specific, isn't very clear from the sprites themselves. Unfortunately, due to spacial limitations with the Nintendo 64's game cartridges, the shotgun does not feature a pump animation, leaving the player with no profile view of the weapon. The pickup sprite for the gun, however, still seems to resemble the "Dakota" cap gun.
12 Gauge Double Barreled Shotgun
The only new weapon to appear in Doom II was the "Super Shotgun," a break-open 12 Gauge Double Barreled Shotgun with a sawed-off barrel and intact stock, that proved to be extremely popular in multiplayer circles. The weapon has since appeared in every Doom title since, save for Doom 3, which didn't introduce the weapon until its expansion pack Resurrection of Evil. The gun always fires both barrels at the same time and is instantly reloaded upon doing so, making it the only weapon in the classic Doom game to do so up until Hacx introduced a reloading Uzi. A slightly more detailed looking sawed-off appears in Doom 64, although due to a lack of memory space on the game cartridge, the gun's lengthy reload animation was cut. However, it still makes the necessary sounds.
Submachine Guns
Generic SMG
Doom Guy is holding a futuristic SMG on some official artworks, but it, however, does not appear in the game itself. Perhaps this is the "remnant of influence" of the early Alpha versions, where the SMG (albeit of a more "usual" appearance) was originally used instead of the chaingun.
Machine Guns
"Chaingun" (Tootsie-Toy "Ol' Painless"/Hand Held M134 Minigun)
Found in Doom's second level, the "Chaingun" (actually a minigun) is a machine gun weapon that's useful for ventilating low level foes quickly. The graphics are photographed from a cap-firing toy minigun, a Tootsie-Toy "Ol' Painless," which appears to be partly inspired by the hand held M134 Minigun. Interestingly, the in-game pickup sprite ditches the real world inspiration of the toy for what appears to be a box fed minigun that appears as if it's supposed to be held like a conventional rifle. Interestingly, the Heavy Weapon Dude enemies in Doom II actually hold the gun with one hand while using their other arm to feed a cartridge belt that itself comes from a backpack the zombie soldier wears.
Launchers
"Rocket Launcher"
As the name implies, a powerful weapon that is effective over long distances, but deadly for the user himself at close quarters (unless you use invulnerability).
Rifles
Generic Rifle
Zombiemen and the world graphics of the protagonist character (Referred to as Our Hero in Doom II, and more colloquially known as Doom Guy by fans) both carry a rather generic looking rifle that looks to be something of a cross between an M16 and a USAS-12 shotgun. This is actually the remainder of the Doom alpha versions (see below). It is not usable in the final version of the game, being replaced with the Pistol. In addition, the "clip" sprite in the game also still features a large box magazine that clearly fits into the rifle and chaingun, but not in a Beretta 92.
Other
Weapons of the Doom Alpha Versions
Alpha versions of Doom used different graphics for weapons. Version 0.2 has only a "Dakota" shotgun as actually aviable weapon. In the 0.3 and 0.4 Alpha versions, instead of the usual fist, a rifle with a attached bayonet was used, instead of a pistol was used the same rifle (but with bayonet disattached), the shotgun had an original unedited look, and instead of a Gatling-style chaingun it was used another weapon, looking more like as SMG (curious resemble the Star Z-45). Alpha version 0.5 changed the graphics of the rifle and machine gun to new ones (but the others remained the same from 0.4, including the version of the rifle with a bayonet), giving them a more futuristic look (and the "machine gun" now really looks like a machine gun). The Press Release version finally changed all this to the weapons that everyone knows from the final version.
Another interesting detail is that the Alpha versions depicted a shotgun with a sawn-off buttstock (and in this form it can still be seen in the final version on the artworks), but later the original buttstock was returned to him.
You also may find some interesting extra info there: [1].