"[...]
- 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
[...]"