This is a fairly easy Achievement to obtain. Load up Mission 5 and you'll find yourself having to look for a few items while the Alien hunts you down so make use of your motion tracker and do not run, if you find yourself with the Alien find a locker and hide and make sure if he walks up to the locker that you press LT and pull down on the LS to be sure he doesn't find you.
*Note - You can not reload after dying but apparently you can quit before the death animation and get it, follow the steps I take you shouldn't encounter too many problems.
Below is a video of me showing how to get the Achievement pretty quickly