1. Black Mesa Achievements
2. Permeable Infrastructure achievement

Black Mesa

1,077

50

4.42

10,304

812 (8%)

20-25h

Game action

• 2 want to boost

fredericoa7x

500

29

27 Oct 16

42h 52m

Permeable Infrastructure achievement in Black Mesa

Permeable Infrastructure

Use the alternate path in Office Complex.

0

31 October 2016 - 1 guide

How to unlock the Permeable Infrastructure achievement

• keoskey86,874

  24 Dec 2015 24 Dec 2015 24 Dec 2015
  1 0 0

  Here is a video that will show you where the alternate path is located
  Credit for the video goes to youtube user Costree.
  

• Have you got any tips or tricks to unlock this achievement?
  Add a guide to share them with the community.

  Sign in and add a guide