• RoE takes place two years after the events in DOOM 3
• You play as a different marine this time around
• Sent to assist Dr. Elizabeth McNeal in investigating a strange beacon on the planet
• Betruger sends three demonic hunters after you when you discover a weapon known as the "Artifact"
• When you defeat each hunter, their abilities are transferred into the Artifact
• The abilities resemble, berseker, slow-mo and invulnerability and are all "stackable"
• Roughly one half to two thirds as long as DOOM 3
• Having the story revolve around two characters may bode well for co-op