Doom 3: Resurrection of Evil

Doom 3: Resurrection of Evil (sometimes abbreviated as RoE) is an expansion pack for Doom 3 developed by Nerve Software and released on. The PC version was sold as a dependent product, requiring ownership of Doom 3 in order to install. A stand-alone Xbox version was later released on October 5, 2005, and included ported versions of The Ultimate Doom, Doom II, and the Master Levels for Doom II as bonuses on the disc.

The expansion pack details a return to Mars by a UAC expedition to investigate a faint signal broadcast to an orbital probe from the abandoned Site 1 facility. Everything once again goes to Hell after the accidental discovery of a forbidden relic sealed away by the ancient Martian civilization. The expansion included several new monsters, including a number of unique bosses, as well as three new weapons.

Plot
Two years after the demonic invasion and destruction of Mars City as depicted in Doom 3, research on Mars has resumed, led by whistleblower Dr. Elizabeth McNeil, who previously alerted the UAC to Malcolm Betruger's activities. Once more, strange occurrences haunt the facility. Red Team, a Marine search team, breaks into a chamber deep within Mars, finding the Artifact — a weapon from Hell that the Ancients sealed away long ago.

The lead Marine, upon touching the Artifact, awakens it. A blast wave kills most of his team and reaches into Hell, alerting the Maledict, Dr. Betruger's new form. The Maledict sends the three Hunters to retrieve the Artifact as Hell begins to invade Mars once again.

Differences from Doom 3
Resurrection of Evil introduces new weapons and monsters. It also addresses gameplay concerns that were raised after Doom 3 was released.

Weapons
The new weapons introduced in the expansion are:
 * Double barrel shotgun
 * Ionized Plasma Levitator, also known as the "grabber gun."
 * The Artifact
 * On the Xbox version you no longer have a flashlight. You are instead equipped with a pistol with a flashlight attachment.

Most weapons from Doom 3 reappear in the expansion with the notable exception of the chainsaw, which is replaced by the grabber, and the Soul Cube, which is replaced by the Artifact.

Monsters
The expansion includes several new monsters:
 * Bio-Suit Zombie
 * Bruiser
 * Forgotten One
 * The Hell Hunters
 * Maledict
 * Vulgar

Monsters which do not reappear from Doom 3 include the lost soul, several minor variants of the zombie, the vagary, and the cyberdemon.

In addition to these differences, the PC and Xbox ports are also slightly different in that the Xbox port features health bars for all boss monsters.

Legal issues in Germany
The game was put on the index of the on May 31, 2005. This means that the game can not be advertised, sold, rented, or otherwise given to minors.

Final storyline
Upon defeating the Hunters and gaining their abilities, the Marine shuts down four core systems of the Phobos Labs in order to divert power to the old teleporters, sending the marine to the Delta Labs, and then finally into Hell. Battling his way through, the Marine eventually reaches the Maledict. After a fierce battle, the cutscene shows the Marine fire a rocket at the Maledict, only to miss and end up in the Maledict's jaws.

Betruger's head pops out and demands the Artifact. With his last strength, The Marine obliges by shoving the Artifact down Betruger's throat, instantly killing the Maledict and destroying the Artifact, leaving only Betruger's skull behind. The screen fades to white, and Dr. McNeil's voice can be heard saying, "Marine? Marine...Welcome home...", implying that both McNeil and the Marine may be dead, and in a better place than Hell for sacrificing themselves for humanity. McNeil may be dead because the life-support in the base had to be turned off so that the portal could be powered, and the marine may be dead from his wounds at the end of the battle with the Maledict. It should be noted that the ending was made deliberately vague and open to interpretation.

Levels

 * 1) Erebus - Level 1: Main Excavation
 * 2) Erebus - Level 2: Erebus Dig Site
 * 3) Erebus - Level 3: Erebus Labs
 * 4) Erebus - Level 4: Erebus Control
 * 5) Erebus - Level 5: Erebus Research
 * 6) Erebus - Level 6: Erebus Station
 * 7) Phobos Labs - Sector 1: Teleportation
 * 8) Phobos Labs - Sector 2: Molecular Research
 * 9) Phobos Labs - Sector 3: Main Reactor
 * 10) Phobos Labs - Revisited: Teleportation
 * 11) Delta Labs - Unknown: Union Aerospace Research Division
 * 12) Hell