Shoot the tethers on the raft in the pool, then jump onto the raft. Note the lever hanging down from overhead, jump up and down to hit it and open bars elsewhere. Go down a short hall and drop through a hole. Kill a Skaarj lying on the floor, then jump into the pool. Swim to the bottom of the pool, locate and follow an underwater tunnel to a small room. Break the urns for gear and deal with the Tentacle on the ceiling. Swim back into the pool and climb up on the stone beams that rise out f the water. Walk up the beams and follow the Nali in the elevated corridor to flares and Tarydium Crystals. Press the loose stone in the nearby archway to lower a lift. Ride the lift up to a room, shoot the urns to collect a clip and take the ASMD in the centre of the room.
Press the button in an alcove and drop through the floor into a small room containing a golden door. Press the square buttons on the wall and enter the Arch Room. Bars block the base of the stairs so take a corridor to the right, which leads to a bridge with a Slith and a Nali. Kill the Slith and walk to the end of the bridge where you can look through a window, remember this spot.
Downstairs is a small room, kill another Slith and note the little square statue in the centre of the room. Pressing it opens a sealed doorway. Go through a short corridor, sticking to the wall to avoid the darts. Ride the lift up and follow the Nali to a room filled with Dragonflies, kill them all, then press a button on one side of the room to make a column sink. Jump onto the column and ride it up, follow the tunnel to where you found the ASMD, drop through the floor and proceed to the Arch Room. Go down the stairs, near the base is a spot where a floor panel moves aside to reveal water. Drop into the water and swim through the tunnel, this connects to several small pools, if you swim to the end of it you’ll find an Assault Vest. Look for a small room that’s accessible from the water. Press the statues mouth to lower a lift that leads back to the Arch Room.
Go downstairs again, jump over the panel that leads to the water, continue to the wooden bridges, kill the Slith and take either bridge. Jump onto the blocks protruding from the walls, cross the room on the blocks and leave through the rooms other exit.
Follow the rope bridge to a big stone door. Press the button on the wall opposite and enter the Fountain Room. Jump on a brick to reach the Super Health Pack sitting beneath the fountain, then take the left facing the fountain. Follow the corridor to a huge room, killing a pair of Sliths on the way. In the room deal with another and more Dragonflies. Follow the bridge down into a room with a water tank and a lever. Pull the lever and race back upstairs. Get on the moving platform and ride it to the golden door. Go through the door into the Eightball Gun Room. Fight all the Sliths and note the Eightball Gun on the pedestal in the centre. You can’t get it yet so walk up to one of the golden doors and look through, if you see a small pyramid go inside.
Leap onto the pyramid and stand in the centre, blocks spring out of the wall. Jump onto the rocks to reach a corridor leading to a small room, kill the Skaarj guarding the Eightballs, then return to the Eightball Gun Room, go to the other golden door into a room with a Obelisk. Kill the Slith and jump onto a pile of broken rocks. Upstairs is a room with Nali and a sacred pool. Avoid the pool and get the Super Health Pack from the end of the room. Jump into the pool and a Skaarj enters, get the scuba gear at the bottom of the pool and then kill the Skaarj, now return to the Eightball Gun Room. A new alcove has opened up. Press the lever and walk across the beam it activates to collect the gun.
Return to the Fountain Room, and then the Arch Room, take the debris filled corridor at the side of the room all the way to a bridge. Cross the bridge and leap through the open window in the small room at the end to enter the next level.