Dead Space: Extraction

You'll unlock the Maintenance Bay Challenge after completing Chapter 5 of the story mode. The top score is 253,010 so you need more than this to earn the trophy.

This challenge sees the introduction of the small necromorphs with the 3 tentacles sticking out the back. They will keep their distance and shoot at you. You'll also face the large mother necromorphs that spawn those annoying little things that damage you. For this reason the Flame-thrower tactic can't be used effectively. It is still possible, however you'll need to switch to the Rivet Gun to dispatch the necromorphs, or wait for them to move closer before you get them with the Flame-thrower. Provided you are using a DS3 and pressing , it is possible to deflect the projectiles they shoot at you, although if you're facing a number of them they'll get through. The best way I've found for this challenge is to use the Line Gun. Not only is it great for taking out the mother necromorph before it releases it's babies, but if you aim in the middle of a necromorph with the Line Gun you'll completely de-limb every part of his body which is 1,000 points right from the off. The only problem is you run out of ammo really fast so try to build up a streak of 50-60 at the start then switch to the Rivet Gun and whatever else you get. I got a streak of 49 and ended the challenge with 278,297 points. There are around 140 enemies so if you manage to get 3 streaks of around 40-45 or one streak of 80-90 you'll be fine.