This level is a bit more difficult than the others. There are a lot of roads you can take at the beginning. I found it a bit confusing and you might have noticed that I have changed the solution a couple of times. There are basically two roads from which you can choose one at the beginning. You can either climb down or continue to the right. I will continue to the right since I couldn't find a way up from below without getting back to the beginning.
Walkthrough
Area right
Run forward and save your game at the
crystal. Take a running jump over the gap.
Run forward and climb down. You will come to a spike pit with dart emitters. Wait till the path is clear and take a running jump onto the other side. Pull up. Go further right.
Grey Door (optional)
There is a grey door. Use some dynamite to open it.
If you haven't got any look in the next hidden passage, next paragraph! Step through and crouch to avoid the darts. Kill the
snake. Collect the
small medipak. Then wait for a dart to come out and quickly climb up. Crouch to avoid the next dart. Collect the
dynamite and the
large medipak. Climb back down and run back to the left.
Ladder

Then climb up the ladder above your head.
Half way up is a strange looking wall behind you. Make a backflip into it to find a hidden passage. (Picture) Run to the left to find rapid bullets. If you haven't got any dynamite, there is also some here. Exit again and running jump back onto the ladder.
Climb further up. Pull up at the top and kill the two bats.
Left - Grey Door (optional)
Take a running jump to the left and climb further up. There you will find another grey door. Use the dynamite to open it. Step through. Look down and kill the
scorpion. Drop down and climb up on the other side. Climb onto the next ledge on the right.
Behind you in the left wall is a hidden passage. But inside the chamber is only a snake. Climb two steps up to the right. There you have to kill another
scorpion. Drop down to the right. The next room has darts coming from the ceiling. Collect the
small medipak and the
dynamite. Climb back out to the left. Climb down. Turn right till you come back to the gap with the ladder. Jump over the gap.
Right
Climb further up on the right and up the ladder at the end. Run over the collapsing floor tiles or climb along the ceiling to the right. Climb down the ladder at the end. Shoot the
scorpion from the ladder. Then drop down. Roll to the right and climb up. Climb further up. Run to the grey trapdoor getting past two spike traps.
Grey Trapdoor (optional)
Use dynamite to open the trapdoor. Climb down the ladder on the right. Below kill
two bats. Run to the left. Climb further down and turn right. Climb down again. Jump onto the platform above the spike trap. Kill another
bat. Jump to the other side. Collect the
large medipak and
two heavy bullets. Jump back onto the platform above the spikes and back to the other side. Run back to the left. Climb up and run to the right. Climb up to the top again.
Yellow Handle
Run over to the right, past the next two darts and save at the
crystal. Climb up again and run past the orange trapdoor. At the end, you can find some more
dynamite and a switch. Use the
switch to open the orange trapdoor. Bomb the nearby grey trapdoor and drop down to get a
yellow handle. On the right, you can find
dynamite again.
If it's not there, run a bit to the left and return here.
Orange Trapdoors
Run back to the left and to where the orange trapdoor was. Climb down to find another orange trapdoor. Run to the left and kill the
snake. Then use the
switch. Again, climb down. There you will find another orange trapdoor. Run to the right. There are collapsing floor tiles. Shoot the
snake underneath. Then save at the
crystal on the right and use the
switch. Run back to the left. Underneath the trapdoor, you will find a ladder. Climb down.
Door Key and Switch
Halfway down you will find a platform behind you. Backflip onto it. Then jump over to the left. Climb down the left ladder. Go over to the left and collect the
door key. Climb up onto the platform overhead. Use the
switch. Climb back down and run over to the left. Climb the ladder back up. Now climb down the right of the two ladders, it's on the left wall. Underneath is an
amazon woman. Shoot her from the ladder. Then drop down.
Blue Door (optional)
Take a running jump to the right. Pull up. There is a blue open door.
This door is operated by the switch by the door key! Step through and climb down at the end. Collect the
small medipak. Climb back up and run to the left again. Take a running jump over the spike trap. Run to the left.
Archway

Climb down the right ladder. Drop onto the ledge. Running jump toward the left ladder. Climb further down. Hang from the ledge. Drop down onto the next ledge. Jump over to the left. There you will find an archway. Step through. Save at the
crystal.
Diving
Then jump into the water. Dive down. Swim past the first peak on the left. Dive deeper down. (1st Picture) Turn right again (2nd Picture) and go deeper. On the right, you will meet a
jellyfish. Avoid it, it will harm you.
On the ground are spikes. Swim into the left corner to find a
large medipak.
If you are short on air swim back towards the surface.

Now return to the crossing and dive down to the left. (3rd Picture) Be careful not to hit the
eel. Dive up at the left end. On the ledge on the right lies a
small medipak. Now dive further up to the left.
Further down to the left is a closed blue door. Dive up to reach the surface.
Switch
Climb out of the water. On the right is only a snake. Climb out to the left. Collect the
large medipak. Shoot the
scorpion on the next level below. Run to the end and kill the
bat. Drop further down. By the orange switch, you have to kill
two bats. Then use the
switch.
Underwater Door and Switch
Run back to the right and climb up. Climb up again and jump back into the water. Dive down to the left. Swim through the open door. Use the
switch. Then dive back up.
Blue Handle
Run to the left again. Kill the
scorpion and the
bat. At the end are
two more bats. On the other side of the gap is now a raised platform. Take a running jump to get there. Pick up the
blue handle and save your game at the
crystal.
Way Back Up
Running jump back to the other side. Again, climb up twice to return to the pool. Climb out on the opposite side. Kill the
snake. Here is now an open passage. Roll further to the right. Kill the
skeleton on the other side. Take a running jump over the gap and back towards the doorway. Step through again. Jump over the spike pit. Jump onto the right ladder and climb up. Backflip onto the ledge on the left. Climb up the left ladder. Backflip onto the next ledge on the right and climb the last ladder to the top.
Towards the Locked Door
Take a running jump over the gap on the left. Run further left. Climb up and run past the darts. Drop down on the other side. There is a grey trapdoor.
You can use dynamite to open it and use the slide to get down buy I think another way is safer. You will end up by a save crystal. Step over it and kill the
bat. Go towards the left and kill another
bat. Climb up twice and climb down the ladder on the other side. Kill the
amazon woman below and jump over the gap.
Here is a door where you can use your key. But we will get to this later, since you'll need another handle. Leave the key in your inventory for now. Drop down to where the amazon was. Turn right. Drop further down. There are two orange trapdoors, but you cannot open them from up here. Use the slide at the left end.
This is where you'll come down if you bombed the grey trapdoor.
Red Handle
Save your game at the
crystal. Then run over to the right. Crouch and kill the
snake. Roll through the passage towards another
snake. Kill it as well. Climb up to the right. Kill the
scorpion on the upper level. Jump over there. Collect the
large medipak and
dynamite if you haven't got any. Below is a locked door.
If you have used your first key, the one from above, on the other door you need to get the second one. See next paragraph! Open the door and step through. Drop down. Jump up to the ceiling and monkey climb to the opposite side. Use the
switch there. Drop down from the ledge to find a
heavy bullet on the lower one. Drop further down onto the next ledge. Make a standing jump onto the second and another one onto the third. Jump onto safe ground and step through the blue door, you have opened with the switch. Kill the
scorpion. Get down into the depression and collect the
red handle. Get back up to the left. Jump over the ledges to the other side again. Climb back onto the ledge where you found the bullet. From there further up towards the switch. Jump towards the ceiling and monkey climb back to the left. Climb up and run past the lock Climb further up and down again. Roll back towards the
crystal and save again.
Getting the Second Key
From the save crystal turn left. Bomb the grey trapdoor.
If you haven't got dynamite you'll find it by the large medipak, previous paragraph! Jump to the other side and climb down the ladder. Drop to the ground and run past the darts on the right, at the end drop down and turn left. Climb up and run over the spiketrap with orange trapdoor and climb up. Shoot
two bats. Walk over the second orange trapdoor and kill another
bat. Turn around and take a running jump to reach the upper ledge. Or run further to the left and climb the ladder, climb up to the vine at the ceiling and from there over to the left. Pull up and use the
switch. The orange trapdoor above the key opens. Climb back down by using the ceiling. Dropping down would mean falling into the spike trap. Jump over the first spike pit. Drop into the little chamber and collect the key. Jump over the second spike pit. Run over to the right and climb back up to the left.
Goodies
Normally you are ready to finish the level now but there is more to explore, in the area on the left, which is the area you would have reached if you had climbed down at the beginning. So this whole next part is optional!!
Run over to the left. Look up to note a ladder. Run past and roll through the tunnel. Look up to see a second ladder and run past again.
If you want to finish now. Climb up and use the switches to get to the Locked Door again. Climb up to the left. You will come to a ladder. Don't climb down yet.
Ledges, Door and large Medipaks

Take a standing jump onto the first ledge. Continue onto the second one. Turn right and jump up towards the platform with the door. Step through the door. Climb down the ladder. Take a backflip onto the first ledge. Continue with a standing jump onto the second. Climb up the ladder. Collect the
large medipak. Run through the well hidden passage on the right to get another
large medipak. Run back to the left. Climb back down and backflip onto the platform. Make a standing jump onto the second. Jump onto the ladder and climb back up. Step through the door again. Lower yourself onto the ledge. Make a standing jump onto the next one on the right. Jump onto the safe ground.
Well Hidden Passage
Climb down the ladder. From the platform, make a running jump onto the one above the spikes. Take another running jump onto the platform left. Kill the
scorpion. Climb up and down on the other side. Climb down the ladder. Shoot the
scorpion from the ladder. Drop down. Roll into the well hidden passage on the right. At the end, you will find a
small medipak,
rapid bullets, and when you have wasted it,
dynamite. Roll back to the left.
Run further left. Climb up the ladder on the right wall above your head. Pull up onto the walkway and kill the
amazon woman.
The Artefact (very optional)

Roll to the right. There you will find another doorway. Step through. Climb up and save at the crystal. There you will come to a sanctuary where on the altar lies an artefact. You can't get it now. But this is what the whole level is about. In the far right corner is a collapsing platform. Trigger it, then drop down carefully. In the depression on the left you can find
two small medipaks. Collect them, then climb back up. Run past the sanctuary to the left and climb down. Step back through the doorway and roll to the left.
More Goodies
Climb up the ladder on the left. Careful on the right are four dart emitters. At the top climb down to the left.
If you would climb up the right ladder, you would come back to the beginning of the level.
Jump down at the end and kill the
snake. Jump onto the ladder and climb further down. Shoot the
snake while still on the ladder. Drop down and collect the
small medipak on the left. Return to the ladder and climb back up. Leave it with a backflip. Climb further up to the right and return to the ladder.
Way Back
Climb back down and past the dart emitters. Drop down. Run to the left. Climb down the next ladder. Run to the right and climb up ladder there. Climb further up and down on the other side. Take a running jump over the gap. Take another running jump to reach the other side. Climb up the next ladder and turn right. Run forward till you reach the passage where you have to roll. Overhead is the ladder.
Use this. If you use the second one, behind the passage with the low ceiling you will reach the same destination, but you will miss goodies.
First Ladder with Crystal
Climb up the first ladder. Halfway up is a well hidden passage behind you. Backflip to get in. Collect the
heavy bullets and the
small medipack, then jump back onto the ladder and climb further up. On top jump over to the left. Use the
save crystal and activate the
switch. The orange trapdoor opens. Jump back over to the right. From there climb up onto the next ledge. Step over to the right. There is another orange trapdoor.
This is where you'll come up have you chosen the other path. Climb up onto the ledge on the left and further up to the left.
Behind the Locked Door

Open the door with the key. Step through the door and then go through the archway. Save your game at the
crystal. Roll to the left. There are three niches where you can place the three handles.
Watch the animation. Then run over to the left and pick up the
small medipak. Then slide down to the left. Jump onto the left slope to slow the fall. Run over to the right. You are back in the sanctuary. Press Action to collect the
Panel Piece.