Gamma Energy visits the Aperture Science East facility, built after GLaDOS gained sentience. The goal was to create a facility where GLaDOS' research could be examined and tested without harm to employees or other people who actually... mattered, without her knowledge. Pick up a prototype Portal Device and try not to die.
I've been working on the details recently. Here's one of the areas I've just finished remastering.
I think it's odd that they put turrets in the BTS.
tell that to Glados, sonny
Security.