Call in. A single player mod which plays out at the same time as Gordon and Alyx flees the citadel in Ep1. You take the role of a rebel soldier on a mission to retrieve information regarding the super portal to aid in the building of Dr. Magnussons rocket.
we are all bored with regular vent crawling so i put this in instead. :P
Is that small light the combine core? Good use of lighting and pipes.