provides key hints,objectives with the addition of inventory items. The game features 10 high-tech weapons for the gamers to fight for their life, including classic firearms and explosives such as grenades, SMGs, shotguns and advanced experimental plasma weapons and all time favorite BFG-9000 gun and the chainsaw deadly weapons which are the classics of the Doom franchise. Doom 3 game begins in the year 2145. Most of the game's plot and dialogue was made by Matthew J.Costello (the author). The game's backstory goes something like this that the Union Aerospace Corporation (U.A.C) has established itself to become the largest corporate giant and has set up a research base on planet Mars. At this facility, the aerospace giant is able to carry out research in several scientific areas like future weapons development, bio research, Space Exploration and most amazing Teleportation. Due to the facility's location on planet Mars, this company can conduct its operations beyond any kind of moral or legal boundaries. When the gamers progresses through the gameplay, they discover that the employees on this Martian base are disturbed due to various incidents such as unexplained sightings,hearing voices and increasing problems of paranoia and insanity usually leading to deadly accidents with the base's machinery. Rumors about the nature of experiments in the Delta Labs division of this company are common in base's employees.Doom three was a total commercial success for id Software that is that by the start of year 2007, over three and a half million copies of Doom three had been sold, converting it into the most successful project launched by id Software . Engine for Doom 3 game is called id Tech 4.
