Doom II: Hell on Earth is an award winning first-person shooter video game and the second title of id Software’s Doom franchise. It was originally released for MS-DOS computers in 1994 and Macintosh computers in 1995. The Macintosh version was developed in Austin, Texas by developers such as Brett Butler. Unlike Doom which was initially only available through shareware and mail order, Doom II was a commercial release sold in stores. Master Levels for Doom II, an expansion pack that includes 21 new levels, was released on December 26, 1995 by id Software. Due to its popularity and success, Doom II was later released for the Game Boy Advance in 2002, the Tapwave Zodiac in 2004, and on Xbox Live Arcade in 2010. The release of the original Doom source code has facilitated ports to many other platforms, including the Apple iPod, and several types of cellphones. On August 13, during the QuakeCon 2009 media conference, it was announced that Doom II would be ported to Xbox Live Arcade, and was released in May the following year. Immediately following the events in Doom, the player once again assumes the role of the unnamed space marine. After returning from Hell, the marine finds that Earth has also been invaded by the demons, who have killed millions of people.   Story: The continuous 30 levels are divided into four areas; UAC Underground, UAC’s Starport (Hellish Outpost), City, and Hell. Immediately following the events in Doom, the player once again assumes the role of an unnamed space marine. After defeating the demon invasion on Mars, and saving the Mars base there, the marine goes on leave and lands a drop pod on Earth, and finds that Earth has also been invaded by the demons, who have killed billions of people. The humans who survived the attack have developed a plan to build massive spaceships which will carry the remaining survivors into space. Once the ships are ready, the survivors prepare to evacuate Earth. Unfortunately, Earth’s only ground spaceport gets taken over by the demons, who place a flame barrier over it, preventing any ships from leaving. The marine then battles hordes of demons and is able to deactivate the force field, allowing the remaining humans to escape. Once all the survivors escape Earth, the marine is the only human left on the planet.   More info on Wikipedia. Doom 2 Manual. How to Play: How to Play:WASD:……………….Move Q & E :……………….Strafe Left/Right Hold Shift :………..Run J:………………………Fire K:……………………..Use L:……………………..Next Weapon O:…………………….Previous Weapon