Defeated 1 Siam

Jump off the raised portion and down into the tunnel ahead. The right tunnel is a dead end.

Rotate the valve handle near Gate 3 to open it for Elle. Elle will then open it for you from the other side.

Turn left at the debris, then step onto the raised portion on the left. Walk across and step down into the knee-deep water.

Defeat the Lurker that emerges from the water. The Fire Axe can instantly kill a Lurker with any swing, and an X swing guarantees a head chop.

Past the rusted bus, another Lurker will rise from the water.

Climb to the next raised area. Pick up the Pistol Ammo on the blue tank.

Step down into the next waterway tunnel and walk towards the light from the grating above.

Step onto the left raised portion and pry open the gate with your steel pipe.

Rotate the valve handle on the water pump to lower the water level in the pool ahead.

Step back down and follow the waterway to the left, then take the tunnel to the right.

In the Bilge Tank Area, you can climb down a ladder if you lowered the water level, but proceed ahead first.

Save your game at the !!SAVE POINT!! on the right wall around the left corner.

Enter the room past the save point, walk to the dead body on the bed, and pick up the ++SEWER MAP++ and ++SHOTGUN AMMUNITION++.

Exit the room and climb or drop into the small pool below the ladder outside.

Run through the knee-deep water and climb the ladder at the other end.

Ignore the waterway to the left; step down to the right waterway. Stepping under Gate 9 is useless.

Move south along the waterway. Step onto the raised area on the left, take the --HEALTH DRINK--, and step back down.

Follow the waterway to the end and arrive at Gate 8. Rotate the valve handle to raise the gate for Elle.

Backtrack up the waterway tunnel. A Needler will attack. Dodge its attacks and strike from the side with the Fire Axe.

Turn left at the end of the tunnel and step onto the raised area. Another Needler will attack from the waterway ahead.

Step into the waterway the Needler came from, turn left, climb back down the ladder, and enter the knee-deep water.

Climb the next ladder, save your game at the save point around the left corner, and step into the waterway next to Gate 12.

Continue south to the area with standing water in front of Gate 4. A single Lurker will attack from the shallow water.

Run back to Gate 4; Elle will open it for you. Duck under the gate.

A Needler will race down the waterway ahead. Follow the waterway east, step onto the raised area on the right, and pick up the --SHOTGUN AMMUNITION-- from inside the big pipe.

Follow the waterway northeast. A Needler will attack near the end of the tunnel.

Step onto the raised area to the left.

Climb down the ladder to the right. Step across the metal bridge to the spillway.

Kill the two Lurkers in the shallow water. Elle will eventually follow.

Step onto the east side of the Spillway. The door to the left is sealed. Climb the ladder on the south wall.

Follow the corridor west. A Needler will attack. Defeat it.

Continue west and pick up the --PISTOL AMMO-- and --SHOTGUN AMMO-- from the right wall.

Venture back east and find the lever on the right wall next to a light. Pull it to open the gate on the east wall.

Move into the Drop area.