Secret experiments on Mars' moon Phobos have torn open a hole in space, swallowing its companion moon Deimos and letting loose all the imps, demons, lost souls, monsters, and mutantsfrom hell. As a space trooper with a variety of weapons and technological artifacts at your disposal, it all comes down to tough-slugging battle tactics, lightning reflexes, and superior maneuvers of all kinds. Will you defeat the evil hordes, or fall in gruesome defeat? Get the inside tips in the "Doom Battlebook" and your destiny is secure! This book gives you: Hints, clues, and outright solutions to all of the cruelly mind-bending puzzles Strategies to help you get more bang out of each of your weapons Maps showing all the mazes and hidden rooms Coverage of all nine new levels of play, including the secret level!Know thine enemy! Why walk into battle like a lamb to the slaughter? "Doom Battlebook" gives you the power to wipe out the evil minions for good!