Level 18. Floating Fortress (2)

On the boat at the start of the level, maneuver it to the right side platform. Hit the switch behind the crates. A door will begin sliding back and forth. Jump on the tallest crate, then to the other side. Jump onto the crates on the opposite side and then onto the sliding door. The door will return you to a chamber. Blast open the crack and shoot the switch inside the room for some items.

In the room before the Serpent Boss, locate a corpse dressed in blue. Stand facing the corpse with the window behind it in your line of sight. Back away and crouch. You should find a spot to dive down into for a medikit.

In the weapons department, check the turret and position its barrel to face west. Then, go outside, jump onto the cannon, walk on the barrel, and jump into the air vent.

Inside the lower level of the naval vessel, in the bedroom featuring a "Jolly Roger" pirate flag on the wall. Check the D. Jones locker and the wall inside it. You will enter another room. Check the girl for an item, and open the other locker labeled "C. Hook" for a guardian head.

Check the PC monitor in the power room. A control panel will open in the opposite room, revealing some items.

In the room after the rail gun turret, proceed up the ramp. You should see a small gap in the floor containing items. Destroy the wall directly above it to widen the gap. Then, crouch and walk against the wall. The blast should be sufficient to widen the gap, allowing you to drop down for some items.