This review is intended purely as an assessment of how Doom 3's content and gameplay stand up today. If you're interested in the features and technical aspects of this new version, Digital Foundry will have extensive coverage for you over the next two days.
If anything encapsulates Doom, in all its wide-eyed and gory glory, it is the three letters BFG. In an age where arms manufacturers lobby publishers to include real-life killing machines in FPS games, there's something quite innocent, even sweet, about the idea of shooting a green plasma ball from a Big F***ing Gun.
The BFG does seem to sit oddly, however, in the most recent and somewhat humourless entry in the series. Doom 3 mostly takes place in an oppressive, winding research facility on Mars - a cold metal labyrinth of funnelling corridors, filled with the remnants of the recently deceased and subject to constant invasion from hell's forces. It is an environment designed to induce claustrophobia, always hemming you in and frequently blocking you off. A world that, regardless of the plentiful monsters, is never a nice place to be.