Dark Woods of the Serpent
Clear the hallway and take the shells behind the two panels.

Enter the large dojo and kill the ninjas in the room to the right. There are more shells behind two additional panels.

Climb the ladder and secure the entire area. You'll find missiles, clips and med kits scattered about.

Enter either hallway and kill the ninjas inside. Press the button on the wall and return to the room below where the two panels were. You will find a panel with three buttons on it. Press the left and the right one, but leave the middle one up.

Climb back up the ladder and return to the hall where you pressed the first button. Hit the new button and take the bronze master key.

Go back down and out to the hallway where the bronze door is. Insert the key and enter.

Jump into the courtyard and kill the coolie. Behind the large tree you'll find a slot above with clips in it.

Now enter the dark woods. 

TOUGH SPOT Continue into the woods and kill the rippers.

Find the wooden shaft located to the right of the entrance to a small shrine. Blow it open.

Crawl into the shaft, find the small panel with the symbol on it and press it. This will deactivate a trap inside the shrine.

Walk back out and enter the shrine through the front door.

Grab the gold key in the middle of the room, and the med kit if you need it.

Walk back out of the woods and through the tunnel in the tree to another courtyard. Kill the coolies and search the large tree for a slot with shells in it.

Insert the gold key into the keyhole next to the large gate and enter it. Continue into the woods and find the well. Jump in and swim down then up into a small room.

Press the button on the wall and the small wash basin will position itself in front of the large picture on the wall.

Jump onto the wash basin and up again to get the red key atop the picture.

Use the key to exit this room.  Now find the white building with the red keyhole next to it.

Insert the key, enter the complex and kill the ninjas.

Find the building with the bunnies inside and press the buttons on either side.

Now exit this building and run through the tunnel to the other courtyard. Enter the building with the two statues to get a fortune cookie.

Now find the small building with the window in the back. Shoot the TNT barrel inside to blow the door open. Enter and pull the lever.

Now run across to the building with the pool in the middle. Secure the area and take the stuff in the pool. Make sure you grab the toolbox if you don't have one already.

Walk through the tunnel and into another courtyard. Hop in the tank and kill all of the ninjas in sight.

Blow open the discolored wall and drive into the next area. Now blow open the front door of the small white building behind it there's ammo and a fortune cookie on a ledge.

Enter the building, kill the red ninja and climb on top of the small pillar to open a portal in the wall.

Enter the portal kill the rippers, bees, and ninjas across the stream.

You should collect as much ammo as you can.

Return to the area you came from and find the waterfalls on the far side. Climb the rocks to the top. Now kill the rippers inside without going into the cave itself. Watch out for the big ripper.

Enter the cave when they are all dead and take the fortune cookie behind the large rock in the middle of the stream.

Gather as much ammo you can and jump into the area below the cave.

Enter the cave with the red carpet and jump onto it. Hang on for a magic carpet ride.

When you get into the large cavern kill the ninjas on the ledges and jump onto one of the ledges.

Walk into the cave and blow up the barrels to reveal an armor vest, a fortune cookie and Lara Croft. 

Walk back out to the ledge and wait for the red carpet to come back around. Jump on and ride it around to another cavern.

Get off, secure the area and walk up the incline to the lever and pull it revealing 2 controllers. Use the controllers to move the two pillars into position.  You must be able to get to the switch next to the throne on the far side.

When the pillars are in position jump over to the ledge. Press the button and run through the revolving throne.

Pull the lever at the end of the hall and return to the area with two controllers.

Now re-position the two pillars so that you can get over to the moving ledge.

Jump to the moving ledge, enter the cave and stock up on ammo.

Drop into the final chamber and get ready to fight the big boss.

Walk forward and make a mad dash to the other side of the chamber before the he sees you. Stand behind the far-left pillar and bounce grenades off the wall towards the boss. If you don't have grenades you'll have to run from pillar to pillar taking small bursts of shots at him. If he hits you twice you're dead.  Good Luck!