Level 13. Unfriendly Skies (2)

In the baggage claim area, jump onto the track. When you see a red button on the right, jump off the track and press it. Quickly jump into the open panel before it closes.

Inside the shop labeled "Impulse Gifts", interact with the cash register. A panel in front of you will open, revealing a fortune cookie.

Locate the room containing 3 phones, 3 Pachinko machines, and one black and one blue dispenser machine. Jump onto the Pachinko machines, then onto the black dispenser machine. Access the open panel. If this panel is not visible, you must first obtain the red pass key from inside the airplane cabin and use it on the elevator door, then ride the elevator.

In the control room, jump onto the coke machine, then jump left onto the dispenser machine. Face right and shoot the button on the dispenser machine to reveal items.

Enter the area with numerous Pachinko machines and an airplane cabin. Facing west, shoot the button located on the eastern side of the 3 Pachinko machines that are by themselves. Jump onto these machines and enter the open panel to find a Missile Launcher.

In the room containing the plane's engine, jump and interact with it to find a panel that opens to reveal a Rail Gun.

This secret leads to the second hidden level, Level 22: Auto Maul. Follow these steps to reach the secret level end switch:

• Find the elevator marked with "Gate 21A" and "Gate 21B" above it. Press the button to make the elevator arrive with its doors open.

If you can press the button, walk out of the elevator, then walk back in. You should now be on top of the elevator. There is a switch on top; hit it so the elevator will transport you to the top, where the secret level end switch is located.