Doom was the third IP released by game developers id Software, it came out only a year after the revolutionary Wolfenstein 3D and continues to be cited as one of the greatest and most influential video games of all time. Nothing like this had ever been seen on PC's or consoles before and the franchise continues to blast the industry away.

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With the newest installment, DOOM Eternal set to be released this November, it's only proper to look at where it all began. While there is some well known and crazy trivia out there, here are ten things you probably didn't know.

That’s right, you’re favorite Nazi slaying American soldier is also the great-grandfather of the Doom Slayer. It’s a little bit of a confusing family tree but basically, the main protagonist of Commander Keen is the grandson of William ‘B.J’ Blazkowicz, who either becomes a space marine or has a kid who’s son becomes a space marine.

The story follows the original DOOM game and states that BJ was a space marine who assaulted his superior officer for ordering his unit to fire on civilians, as punishment he was transferred to the boring dry desert of Mars, the home of the UAC. After receiving a distress signal from Phobos, one of Mars’ moons, BJ and his team head over to see what is going on, after he receives no word from his team who entered the base, BJ decides to go in himself armed with only a pistol officially becoming Doom Guy.

9 Evil Dead Inspired Weapons

This may not be a huge surprise to fans of Sam Raimi's Evil Dead franchise. Coming out in the '80s, the first film is a cult classic horror film while the sequels serve as almost dark comedic parodies of its predecessor.

Thanks to the endless love fans gave to the chainsaw scene in almost every rendition of the movie, including 2013's one, both it and the super shotgun made their way into DOOM and has been just as loved on Mars as on Earth. Although there is seemingly no reason a chainsaw would be on Mars, it is discovered that they were shipped there by accident since the UAC actually ordered jackhammers.

8 The Super Shotgun Is As Powerful As A Cyberdemon

This may be surprising to some, but the super shotgun has the same amount of power to blow limbs apart that the Cyberdemons and a direct hit from a rocket launcher do, albeit at very close range. The super shotgun was the only new weapon to be featured in DOOM II and does nearly triple the damage as the regular double-barrelled shotgun, which is pretty good since it takes double the ammo.

The super shotgun is most powerful with well-aimed shots and is better than a rocket launcher to use when you are being surrounded by Hell's charming inhabitants, not only does it blast away what is in front of you, but also anything standing near. With that being said, it does take longer to reload so you better hit the mark on that first shot.

7 The Nightmare! Level Was Added As A Joke

The developers added this absolutely not funny joke to DOOM II after getting a series of customers complaining the game was too easy, which is hilarious considering anyone who plays on that skill level utters the sentence "is this a joke" at least 100 times. It's the kind of level you put on for someone who has never played the game just to see their reaction and it took 19 years for someone to successfully speed run some of DOOM II's harder levels.

When choosing the level the game actually warns you that it isn't even remotely fair, which it is not. Essentially everything is the same as the Ultra-Violence mode except you get double the ammo, no cheat codes, the monsters are much faster and they respawn at a higher rate and no one ever plays it and the wonderful devs of DOOM recently added an Ultra-Nightmare! level to DOOM 2016.

6 Perfect Hatred Was Made In Six Hours

The co-founder of id Software, John Romero built the second map of Thy Flesh Consumed in the updated version of DOOM in only six hours. The title of the map comes from Psalm 139:22 and took the smallest amount of time out of every one Romero worked on, starting at midnight and finished at 6 am.

The level is open yet compacted which means you face a slew of enemies from the very start with almost no cover and lot's of direction to come at you, plus the floor is literally lava.

5 Spawning Vats Was The First 'Real' Level

Although it's the seventh map of the second episode in the game, Spawning Vats was actually the first ever DOOM level ever to be properly made and is by far the largest in the game. The level contains lots of secrets to find and the earliest versions of it appeared in DOOM 0.4 and 0.5.

The level was designed by two people and is pretty big but features lots of small rooms and lots of monsters, mainly Imps and a few other demons, even a soul sphere is hidden here. In case you were also wondering why it is called Spawning Vats, it's because this is where new demons can be bred with artificial flesh and bone, fun!

4 Released The Day After A Senate Hearing On Violent Video Games

Back in 1993, the U.S Senate held it's first hearing about violence in video games, mainly sparked by the brutality in the recently released Mortal Kombat and Night Trap, primarily MK's Fatality system and the sexual allure of vampires in Night Trap. The first hearing was held on December 9, 1993, and the very next day, id Software released the very first demon-crushing DOOM game.

While the game was not brought up in these hearings, a few years later, the media and politicians had it front and center after one of the Columbine shooters said he had mapped out the attack on the game, which even led to many families suing the game company for wrongful death.

3 The Creator Of DOOM Coined The Term 'Deathmatch'

While every gamer knows what the term deathmatch means, not everyone is aware that the Co-founder of id Software and co-creator of DOOM actually coined the term. While previous games had deathmatch elements and gamers used the word themselves, the industry began using it to classify game modes after John Romero started using it to describe the gaming sessions he had with DOOM's other creator John Cormack while the two were developing the game's multiplayer.

It outlined rules for trash-talking and breaking stuff while they played games like Street Fighter II and Fatal Fury, which eventually leaked into their own game.

2 Intense Sound Engineering

DOOM has become pretty famous for not only it's signature "rip and tear" style of play, but also the incredible and intense music within the game. Much of the sounds and music in the game were made by a pretty weird combination of sounds, for example, the wonderful 'gore' sounds were created by slapping together some raw meat, macaroni salad, pistachio shells, wet cloth, and much more.

Less surprising, almost all the DOOM games feature some pretty well-known inspirations like Alice In Chains, Nirvana, and Metallica (among many others) and, to really hit the nail on the demonic head, if you play the song 'Cyberdemon' through a visual synthesizer you can actually see '666' as well as a pentagram.

1 The Most Installed Piece Of Software Of 1993

The original DOOM is one of the most influential games to ever be released. The company who created the game had previously created the first modern FPS game (Wolfenstein) and the game has even been added to the Library of Congress. Since it was the 90's, piracy was alive and booming which stopped the game's sales from climbing ever higher, however, the developers leveraged the shareware market to it's fullest extent.

It was the most installed piece of software in 1993, in second was Microsoft Windows, and by 1994 around 15-20 million people had installed the game and were making their way through Hell and id Software reportedly making $100,000 a day.

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