Level 18. Floating Fortress (2)

At the start of the level, steer the boat to the right platform. Interact with the switch behind the crates to activate a sliding door. Jump onto the tallest crate, then to the other side, and onto the crates there. Finally, jump onto the sliding door to be transported to a chamber. Destroy the cracked wall and shoot the switch inside for items.

Before the Serpent Boss, locate a corpse dressed in blue. Stand facing the corpse with a window behind it. Back away and crouch. You should find a spot to dive down to obtain a medikit.

In the weapons department, position the turret's barrel to face west. Exit the room, jump onto the cannon, walk along 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, examine the D. Jones locker and the wall within it to access another room. Interact with the girl for an item, and open the "C. Hook" locker to find a guardian head.

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

After the rail gun turret, proceed up the ramp. You will see a small gap in the floor containing items. Destroy the wall directly above the gap to widen it. Crouch and walk against the wall; the explosion should enlarge the gap enough for you to drop down and collect the items.