Jump over the little beasties, and shoot the power line. Then swim
back to the top of the pit where you first dove in.

Scene 10 - HRTB
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Get out of the water and go left. Go up the teleporter, and then up
the stairs to the left. Then go right until you get to the room
with the big alien and three doors between you and him. Go about
halfway to the doors and make a shield. Then go up to the doors and
they'll open. Because you made a shield, the guy should start
rolling grenades. When he does, back away. The doors will close
and the grenades will kill the alien. Then go through the doors.
Blow a hole in the next door and continue right. Go up the
teleporter and charge your gun. Go back down it and continue
right. You are now at the ceiling level above the guy to the left
of the pit of water. If you look at the green glass balls, you can
see his reflection as he paces. Squat and shoot so that a ball lands
on top of him. Then make your way back to the pit of water. Swim
across. Go right and you'll see the dead alien with shattered glass
around him. Keep going right.

Scene 11 - BRTD
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After going right, you will fall down a pit. Shoot the door to your
right with a large laser blast. Then run right. Just keep
running. You will get to a screen with a gate at the right. Along
the ceiling there is an air duct. Stand under that and keep making
shields to your left. Your friend will come and reach his hand down
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