Doom 3 is a
Ignoring the events of the previous
The game was a critical and commercial success; with more than 3.5 million copies of the game sold, it is the most successful game by developer id Software to date. Critics praised the game's graphics and presentation, although reviewers were divided by how close the gameplay was to that of the original
Doom 3 is a story-driven action game played from a
The game's levels are fairly linear in nature and incorporate several horror elements, the most prominent of which is darkness. This design choice is not only intended to foster feelings of apprehension and fear within the player, but also to create a more threatening game environment in which the player is less likely to see attacking enemies. This aspect is further enhanced by the fact that the player must choose between holding a weapon and holding the flashlight (until the BFG editions released in 2012 made the "duct tape mod" a standard feature), forcing the player to choose between being able to see and having a readied weapon upon entering a room, which consequently leads to a more deliberate pace for the player. In addition, the levels are regularly strewn with corpses, chopped body parts and blood, sometimes used in conjunction with the game's lighting to disorient the player.
Frequent radio transmissions through the player's communications device also add to the atmosphere, by broadcasting certain sounds and messages from non-player characters meant to unsettle the player. Early in the game, during and directly after the event that plunges the base into chaos, the player often hears the sounds of fighting, screaming and dying through their radio transmitter. The ambient sound is extended to the base itself through such things as hissing pipes, footsteps, and occasional jarringly loud noises from machinery or other sources. Often ambient sounds can be heard that resemble deep breathing, unexplained voices and demonic taunting from the game's antagonists.
Early in the game, the player is provided with a
Doom 3 was released with a four-player multiplayer element, featuring four game modes. However, the game's community created a modification to boost this to eight or sixteen players. The Resurrection of Evil expansion would later officially increase the player limit to eight. The four game modes are all
As of April 15, 2010, the Xbox Live service was shut down, thus online multiplayer for the original Xbox game is no longer available.