Level 18. Floating Fortress

Start by eliminating ninjas at the top with a Missile Launcher or mounted gun.

Dive underwater to swim under the locked huge door. Surface and head towards the "Zilla Enterprises" sign.

Kill female ninjas at the sign and on the "103 ship".

The door under the sign requires a red key, and the door on top of the "103 ship" requires a blue key.

Dive back underwater and use your compass to find a square-shaped surface in the middle of the ship (set compass to North and South).

Surface inside a dark room, kill the female ninjas, and proceed to the next room.

Hit the switch near the brown ninja, then hit the Manual Override (red-lit switch) near the red ninja to cause an explosion.

Head to the "Level" window (next to the "Pump" window) and hit the switch inside to access the "Flood Control Dam" room.

In the "Flood Control Dam" room, hit the switch to open the adjacent door, entering the mechanism room.

Kill ninjas on the top right, then hit switches 2 and 3. Lower the panel and hit the "Pump" switch.

Blast the steel fence with missiles to reach and kill the Serpent Boss.

Use a floating crate to jump to where the Serpent Boss was and pick up the RED KEYCARD.

Enter the twirling water to return underwater, then surface and go to the red key door. Use the key and proceed.

Kill baby rippers, head to the Northwest corner, and hit the switch.

Use crates to jump onto the risen platform, then to the portable medikit, and then to the other side. Hit the switch to lower a door.

Go through the door, hit the switch below the tool kit to illuminate the room, and kill all ninjas.

Approach the steamed vehicle. Kill spawning female ninjas on crates.

If needed, grab a repair kit from the crates (use the forklift to jump). Repair the steamed vehicle.

Blast crates to the East (set compass to East) and hit the switch to create a way.

Go through and grab the blue key. Kill emerging baby rippers and a Serpent.

Return to the blue key door on the "103 ship" and use the blue key. Go through and up the ladder to the upper level (radar and captain's rooms).

Kill rippers, stock up on items, then head to the dining room on the lower level.

Kill everyone in the dining room. Find uzi ammo behind the freezer in the kitchen.

Go through the right door (next to the red-lit ladder) and kill enemies.

Enter Medical (Medlabs) through the first door on the left, kill enemies.

Go to the locker room (first right), kill ninjas. Find ammo behind lockers and grenade shells in the shower room.

Head West into the bedroom. Kill two ninjas.

Search lockers: behind C. Bligh for sticky bombs, C. Ahab for night vision goggles, D. Jones for a secret to the girl's room, and C. Hook for a Guardian Head.

Hit the switch next to the girl's bed to exit. Head to the room ahead.

Go through the double doors to the right, kill female ninjas. Note that torpedoes cannot be detonated.

Behind the phone, near the radar system control computers, find the yellow key.

Make your way back to the yellow key door (on your way back, take the right path and keep going until you see an opening on the left). Use the YELLOW KEYCARD and go through.

Head through the door to the power room and kill female ninjas. Hit the switch below the Atomic symbol to restore power.

Go through the teleporter back in the room. Kill baby rippers along the way.

Hit the switch in the small room to open a door and turn on distant lights.

Make your way back underwater and swim to the lights. A fan will blow you to the other side underwater.

Quickly surface and head for the burned place to end the level.