Hello, I am David Andersson, and welcome to the guide to completing Chapter 2 – On Your Own to 100%. In order to get 100% you must pick up all the collectibles. That is the log, one audio log, and the artifact, one Earth Gov Artifact. You also have to complete Chapter 2 – On Your Own on the impossible difficulty.
Watch on YouTube: http://youtu.be/w-uyKbCx8co
Audio Log Location
The audio log is in the room you start in on a desk in the wall:
Earth Gov Artifact Location
The Earth Gov Artifact is at the end of a long corridor that you get to just before reaching the bridge:
Next you have to complete the rest of Chapter 2 – On Your Own on the impossible difficulty. I have already produced a guide for which you can find here: http://wp.me/p1SfP0-1lQ
Once you have done all that you will have completed Chapter 2 – On Your Own to 100%.