DOOM 1 Xbox 360 \ Gameplay | Original Doom I 1993 id Tech 1 No Commentary Let's Play HD

Doom (stylized as DOOM or DooM in other media) is a first-person shooter (FPS) game developed by id Software for MS-DOS released in December 10, 1993. It is one of the most significant games in video game history, and is frequently cited as one of the greatest games of all time. Players assume the role of a space marine, popularly known as "Doomguy", fighting his way through hordes of invading demons from Hell. The first episode, comprising nine levels, was distributed freely as shareware and played by an estimated 15–20 million people within two years; the full game, with two further episodes, were sold via mail order. An updated version with an additional episode, Ultimate Doom, was released in 1995 and sold at retail. Along with its predecessor Wolfenstein 3D, Doom helped define the FPS genre and inspired numerous similar games, known as "Doom clones". It pioneered online distribution and technologies including 3D graphics, networked multiplayer gaming, and support for customized modifications via packaged files (WADs). Its graphic violence and hellish imagery made it the subject of controversy. The Doom franchise continued with Doom II: Hell on Earth (1994) and numerous expansion packs, including Master Levels for Doom II (1995) and Final Doom (1996), all ported to numerous platforms. The source code was released in 1997, inspiring further adaptations. Id returned to the franchise with Doom 3 (2004), a horror-focused retelling using the id Tech 4 engine, followed by a 2005 Doom film. A 2016 reboot, also titled Doom, powered by id Tech 6, returned to the fast-paced action of the first games. Gameplay Doom is a first-person shooter presented with early 3D graphics. The player controls an unnamed space marine—later termed the Doomguy—through a series of levels set in military bases on the moons of Mars and in Hell. To finish a level, the player must traverse through the area to reach a marked exit room. Levels are grouped together into named episodes, with the final level focusing on a boss fight with a particularly difficult enemy. While the levels are presented in a 3D perspective, the enemies and objects are instead 2D sprites presented from several set viewing angles, a technique sometimes referred to as 2.5D graphics. Levels are often labyrinthine, and a full screen automap is available which shows the areas explored to that point. While traversing the levels, the player must fight a variety of enemies, including demons and possessed undead humans, while managing supplies of ammunition, health, and armor. Enemies often appear in large groups, and the game features five difficulty levels which increase the quantity and damage done by enemies, with enemies respawning upon death and moving faster than normal on the hardest difficulty setting. The monsters have very simple behavior, consisting of either moving toward their opponent, or attacking by throwing fireballs, biting, and clawing. They will fight each other if one monster is accidenta