Trapped Sentinel
Posted December 10th 2006
After destroying the first pulse generator, immediately run to one of the four 'inlet pipes' around the room and jump up inside (it's just manageable). A Sentinel will usually materialize at the back, and you can potentially see this happen. Initially it seems partly embedded in the ground, but after a while it rises to come forward. Stand in the way to block it and to get an extremely close view. Use Easy so it doesn't hurt too much.