Aliens: Colonial Marines achievements

Aliens: Colonial Marines

2.7 from 2201 votes

There are a maximum of 60 Aliens: Colonial Marines achievements (50 without DLC) worth 2,519 (1,250)

30,255 tracked gamers have this game, 1,739 have completed it (5.75%)

Achievement Details

No Need For Alarm in Aliens: Colonial Marines

No Need For Alarm28 (20)

Complete One Bullet without setting off the alarm

  • Unlocked by 15,357 tracked gamers (51% - TA Ratio = 1.40) 30,255  

Achievement Guide for No Need For Alarm

161,002 (83,850)
Achievement won on 13 Feb 13
TA Score for this game: 1,985
Posted on 13 February 13 at 19:30
This solution has 7 positive votes and 4 negative votes. Please log in to vote.
To make this easier, play solo on Recruit. There are only a few parts you have to get through sort of sneakily. You can actually just reload a checkpoint at any time when the alarm goes off. You will know it goes off if you hear it blaring and a computer announces gas is being released.

The first thing to do after the scene with Bella is run up the stairs. The scientist will see you through the window so you have to run to the control panel on the wall by the door. As you go along you can scout ahead to see the situation and use your motion tracker. I used a suppressor on my pulse rifle and went for headshots as well. Reload at any time you screw up. Do not worry about the outside portion with the APC but when you get back inside to shut off the 3 power cores be stealthy again just to be safe. After taking out the cores and going back upstairs to shut the power off, the achievement will pop.
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