Lost Valley

Follow the tunnel until you reach the river. You can either jump in or
go to your right and do some cliff diving. Find a safe place to exit
the lake and kill the 2 wolves on patrol. Climb over the rocks
opposite the waterfall and enter the cave. Kill the wolf that attacks
then continue further and turn right. Jump into the slanted chamber
and kill the 3 wolves waiting here. Don't go any further as it is just
a dead end. Return to the room you were just in and find the ledge
you can pull yourself up onto. Continue climbing until you find the
skeleton and a medkit. Continue forward and slide down into the
valley. A red Raptor rushes you. Fire as fast as you can and dodge
this guy's attacks. When he is dead enter the valley and kill the
second raptor. Check your health at this point and make sure its
FULL. Note the broken rope bridge above. Note the HUGE
FOOTPRINTS below. Note the size of the teeth on the T-Rex that
just rounded the corner. Do a LOT of side-jumping and keep firing
until this monster is dead. You may have to heal yourself in mid-
combat. NEVER let this guy get close to you with his mouth or you
are dead no matter what your health bar says. After he is dead run
past him under the bridge until you reach 2 waterfalls. Climb the
ledge to the right of the right waterfall to find SECRET #1:
Shotgun shells. Go to the ledge between the falls. Climb up 2 ledges
and jump to the right onto the 3rd ledge. Hold onto the ledge and
shimmy to the right until you're in the middle of the falls. Pull
yourself up and into SECRET #2: Shells and Uzi Clips. Return to the
ground (climb or dive) and head for the broken bridge and look for a
door in the grass covered rock. Enter the passage and kill the raptor
waiting down the hall. Advance until you reach a waterfall. Climb the
ledges to the right and get Cog #1. Then dive into the pool. Swim
until you surface at the right waterfall in the valley. Turn left and
advance to the temple in the distance. Take out the 2 raptors
lurking near the temple. Enter the temple and save your game. Take
a swim heading for the right side of this pool to get Cog #2. Exit
the temple and find a climbable ledge along the left valley wall near
the dead raptors. Climb the first ledge then jump left to the 2nd
ledge. Turn left to jump (or grab) the 3rd ledge then do a leap and
grab the 4th ledge. Do one more giant leap onto the temple roof for
SECRET #3 and get the medkit, magnum clips, uzi clips, and shotgun
shells. You can get back down by going left and jumping to the
slanted cliff and sliding to the bottom. Turn to the right and climb
into the cave in the valley wall. Follow the tunnel and save your game.
Continue until you reach the rope bridge. Do the giant leap and grab
the other side of the bridge. Pull yourself up and continue over to
get Cog #3. Do a safety drop to the valley floor and make your way
back to the cave above the first huge waterfall (the beginning of
this level). Next is a series of jump crisscrossing the river. Miss one
and you are going for a ride over the falls so BE CAREFUL! The final
jump requires you to grab the edge and pull yourself up. Follow the
tunnel and cross the bridge. Save your game before crossing then
use the 3 Cogs on the wall then pull the lever. The dam shuts and
the waterfall stops. Do NOT cross the bridge but rather drop off
the side and grab on. Shimmy left and drop onto a rock. Go up and
turn left to SECRET #4 and get a medkit. Jump in the water and
swim until you reach the dam. Turn left and pull yourself up onto the
ledge. Find the skeleton and get their shotgun (they don't need it
anymore). Jump back in the water and enter a tunnel. This is a very
long tunnel but you will eventually surface into SECRET #5 with
shotgun shells and a medkit. Go through the door and jump onto the
dry riverbed. Follow it to the waterfall (or rather where the
waterfall used to be) and dive into the lake below. There is now a
tunnel you can get to which used to be blocked by the waterfall.
Enter the tunnel and open the door and EXIT!