i have the same problem, have spent 3 hours just looking around?

i have the same problem, have spent 23 hours just looking around?

In the room you kill the main guy in that tells you everything about the opperation, turn
around and go back to the opposite end of the room there will be a door and some stairs.
Once there turn around and go behind all the tall stacked boxes and you get out. I hope
my instructions are clear enough.. if not just wonder around that room for a couple of
min. and you will figure it out

Where do you kill the main guy at?

I go up the mountain, find about 12 cave entrances spread all over the hill face. Each
time I go into one I find one or two entrances that are closed off by rock slides. When I
reach the top of the mountain, there's two caves on the left, two on the right, and the
guy you're after disappears into the right most cave on the left. I defeat the guys that
come boiling out, and chase after him, but GAH! Another landslide closed off entrance.

Where do I go to get out of here?!!!