Level 21. Shanghai Shipwreck (2)

Enter the red key door. Interact with the switch located above the firepit. This will reveal a hidden opening in the "face" wall, containing armor.

Locate the area where a waterfall meets lava. To the left of the waterfall, jump onto the stairs leading upwards. Follow these stairs to find a missile launcher.

Find a ladder leading to a cookie. Continue straight ahead through the wall at the end of the path. Inside, you will find some items and a rail gun.

In the semi-circular corridor room, hit the gong. An opening will appear directly opposite the gong, containing some items.

This secret is located in the center of your (minimap (the small circular map in the bottom-left corner of your screen) - a small map displayed on your HUD (heads-up display — the on-screen icons showing health, ammo and the minimap)). Find a tree containing a switch. Face west and jump to obtain some ammo.