"Are there going to be more open environments as well as the claustrophobic corridor ones we've seen so far?

Hollenshead: We have a few open areas, when you move from one complex to another complex, but we're going for that scary thing and it works better within enclosed spaces.

Doom 3 is all about those dramatic lighting effects. When you go outdoors in Mars, you have a single light source which is a giant sun - so the dramatic and interesting and unique things that you can do in interior locations stand out less. It doesn't really make that much sense to go running around on Mars that much."