Doom Slayer/Doom 3

The Marine (aka Doom Marine or the Marine Transfer) is the alternate version of Doom Slayer. In some versions he is a 'retelling' of the original Doom Marine's story, but set on Mars instead of Phobos. He is the main protagonist of Doom 3.

Background
You are a marine, one of Earth's toughest, hardened in combat and trained for action. Shortly after reporting for duty at the Union Aerospace Corporation's Mars research facility, a massive demonic invasion overwhelms the base, leaving chaos, horror and uncertainty in its wake. As one of only a few survivors, you must use overwhelming firepower and all of your combat skill to battle through the demon hordes, find out what went wrong and prevent the evil from spreading. Only you stand between Hell and Earth.

Doom 3
As a Marine in the service of the Union Aerospace Corporation (UAC), you have been assigned to the UAC Mars Base to relieve soldiers whose tours of duty have expired. At least, that's what they told you when they shipped you out. Arriving on Mars, you start hearing rumors of strange voices echoing throughout the facility. Seemingly impossible mechanical failures have claimed limbs and lives with alarming regularity. And morale is lower than you've seen in war zones, with schizophrenia and other mental illnesses spontaneously manifesting themselves among the Mars Base personnel at a staggeringly high rate.

Could the teleportation experiments being conducted in the bowels of the Delta Labs have something to do with the problems plaguing the base? And what about the rumors of an archaeological dig that has uncovered evidence of an ancient Martian civilization, long lost to an unknown cataclysmic event?

From the conversations you've overheard between your fellow shuttle passengers, Counselor Elliot Swann and his bodyguard Jack Campbell, it seems that the UAC is growing concerned about the reports that are filtering back to Earth. Swann and Campbell have been sent to Mars by the UAC board to confront the research director, Dr. Malcom Betruger, and to get to the bottom of the troubles.

But surely none of that is your concern, right? You're just a grunt. What possible affect could Dr. Betruger's experiments have on you ...?

Recently transferred to Mars, this soldier got more than he asked for when Dr. Betruger betrayed the UAC. Surviving his battle with the Cyberdemon he collapsed in a hallway in UAC Mars Base, where he was found and rescued.

Trivia
The title "Doom Marine" or "DOOM Marine" first appears as a title for the main player character appears in various material including the Doom RPG website, and the introduction to the Doom 3: BFG Edition manual. Depending on the source the Marine of Resurrection of Evil is a separate character, or the same character (they are both Marine Security but have different ID numbers in their respective campaigns, and generally different appearances, however).


 * Step into the boots of DOOM Marine and experience his adventures for the first time, or all over again. Featuring enhanced versions of DOOM 3, DOOM 3: Resurrection of Evil and the all-new DOOM 3: The Lost Mission, plus the classics DOOM and DOOM II, DOOM 3 BFG Edition is the consummate DOOM experience.


 * Doom RPG is a first-person turn-based role-playing game set in the Doom universe. Developed specifically for your mobile device, you reprise the role of the Doom Marine made famous in the groundbreaking id Software titles Doom, Doom II, and Doom 3. Say goodbye to humdrum mobile gaming and prepare yourself for the return to Mars in a showdown with the legions of Hell!

Attachments

 * Helmet: The standard issue space marine helmet is airtight and durable, while still allowing a wide view area.
 * Flashlight: Pierce the darkness using this high-powered flashlight. Unfortunately, it is quite large and is almost impossible to use while firing.
 * Spare Mags: Keep ammo close at hand. You're going to need it.
 * Air Tanks: Doesn't offer additional protection but allows demons to see their death in your eyes.
 * PDA: Given to you on your first day on Mars. Allows you to read other people's email and hear their personal recordings.