Secret One
After getting the Amon-Ra item, enter the corridor on your right. There will be several hieroglpyhics on the northern wall here. One of them has a hieroglyphic resembling an eagle. This wall can be broken - shoot it, and enter the secret passage behind it to find a Cell.










Secret Two
In the large area where you get the Shotgun, there will be another hieroglyphic resembling an eagle that can be broken in the top-right corner of the area. Break it to find another Cell at the end of the hidden passage.










Secret Three
Head behind the buildings to the left of where the Orc Captain carrying the Red Keycard can be found. You should be able to see part of a structure in the top of your screen. There is a broken piece of wall at the bottom of this structure. Shoot it with any weapon - and then the power generator behind it. Now proceed through the Red Keycard door and hug the left wall. You will eventually find an opening in the ledge partially hidden behind some palm trees. From here, head south until you come across the same structure from earlier. Collect the Star here to trigger the secret.



















Secret Four
Once you arrive at the pyramid next to the lake, head west to find a lot of palm trees closely together. Travel through the trees until you are stopped by a ledge. A lone palm tree is hiding an entrance to a secret area north of here. Travel behind the palm tree, then head north until you find a small village consisting of four buildings and a few civillians. You will find some Shells, Bullets, Cells and an Experience pickup here. Some Orc Troopers will drop down by drop-pod once you collect the secret.

Secret One
After getting the Red Keycard, return to the structure containing the ooze traces unlocked by the Blue Keycard. Open the red door in the bottom-left corner and shoot all the ooze barrels until you've cleared a path to the glowing light visible in the very bottom of the room. Go here to be teleported to the other side of the level and you will find yourself in another structure. From the position where you arrived in the structure, shoot the breakable wall south of you, then follow the passage all the way to the end to find a Star. Collect it to trigger the secret.



















Secret Two
While in the Library, go to the west side of the building and you will find a breakable eagle hieroglyphic hidden behind some crates. Shoot it and follow the secret passage to the end to find a secret Star.

Secret One
In the top-right corner of the area where you fight the tortoises with your sledgehammer, you will find a sealed-off structure with an Erasergun inside. Ignore this for now. Instead, follow the path to the beach as you usually do and collect the Pistols. When returning, hug the southern ledge until you can see the top of the structure you came across earlier. Shoot at the broken piece of wall and the power generator behind it until you hear it break. Return to the structure and collect the Erasergun inside to trigger the secret.

Secret One
Proceed through the level until you come across a sunflower field. Follow the path south-east of the field until you come to the top of the base you were in during the previous level. Shoot the breakable wall on the very left here and collect the Star behind it to trigger the secret.










Secret Two
When you first come across Kleers in the level, you will eventually see another sunflower field below you, and a star on the ledge above it. Shoot the breakable wall between the two houses above it and collect the Star to trigger the secret.

Secret One
There is a small locked structure north of the structure where you disable the shield generator. Head inside the generator building and go to the area where you collect the Jammer. There is a window through which you can shoot a broken piece of wall on the locked structure. Once it's broken, get the Jammer and position it so it is aimed at the glowing floor tile inside the locked structure. It may be a little tricky to aim, but position the jammer on the very right side of the window and you should get it. Once you do, kill the Orc Captains and the Erasergun Orc, then head inside and collect the Auto-Shotgun to trigger the secret.

Secret One
Upon entering the airbase, head straight downwards until you reach the wall. If you look closely, there is a broken piece of wall here hidden between two trees. Shoot it, then head left through the trees until you come across a Star. Collect it to trigger the secret.

Secret One
After going through the structure containing the four laser towers, there will be a structure to your south. On the western side of the structure is a broken piece of wall with a power generator behind it. Destroy both, then head down a ramp just a little further to enter the structure and trigger the secret. Your reward is an Oozegun, a Star and several ammo pickups.










Secret Two
Just before you enter the boss arena, there will be grass hedge just in front of the western wall of the arena. Head behind it and navigate through the small maze to find a pair of glasses.










Secret Three
Do the same as the second secret, but now head behind the hedge in front of the eastern wall. At the end of this path you will find a secret Star.

Secret One
You will need to find the Certified Eye to unlock this secret. The Certified Eye is being carried by a scientist with a blue coat. The scientist's location is different for every playthrough, so you will have to look around the level. Once you find him, kill him and take the eye he drops, then go to the beginning of the level and use the Eye to unlock the door that requires the Certified Eye. Step through the teleporter and you will find yourself in a large secret area containing some testing rooms and a few enemies. Press the buttons on each room and wait a little to open the room's door and collect the reward inside.



















Secret Two
Still inside the large secret area, go to the top-right corner of this area until you see a broken piece of wall partially concealed behind a shelf. Break these and step through the teleporter that is revealed to trigger the secret and collect the Lightersaber. Break the next wall in front of you and step through the second teleporter to find yourself in a secret room, containing a power generator which you must destroy to reveal a Star.



















Secret Three
Head to the top-right corner of the bio lab (the area where you find the Green Keycard). Shoot the right-most stasis tank with the Infected Gnaar in it and the screen behind it to reveal the entrance to the area behind the wall. Step through the teleporter in the top-right of this room to find yourself on the left side of the bio lab. Break the power generator here, then head out the door and shoot the power generator from a small hole outside the room to unlock the other locked door and reveal some items.



















Secret Four
Before stepping into the green area in the elevator at the end of the level, notice that there is a broken piece of wall at the bottom of this area. Shoot it to reveal a corridor that eventually leads to a long corridor of spikes with a teleporter in the middle. Press the switch to clear a path and go into the teleporter. Shoot the power generator through the hole above you, unlocking the rest of the room, containg various things including a Star.

Secret One
When you get the Red Keycard, return to the beginning of the level and unlock one of the doors at the top of the elevator. Beware of the Orc Assassins as you make your way through the room until you come across a teleporter protected by some concrete barriers. Shoot the barriers and enter the teleporter, revealing a secret area with a Star in it.



















Secret Two
After reprogramming the first missile, go to the top-right of this room and shoot the broken piece of wall partially hidden behind some racks. Shoot it to reveal a switch which unlocks a door to a Star and some ammo which you can pick up a little later on in the level. Mind the Orc Assasins that spawns when you press the switch!










Secret Three
In the same area, you will notice a Star locked behind a door. Later on in the level, you will come across a series of narrow corridors with lasers firing through them. You will have to destroy the lasers with any of your weapons in order to pass through these corridors safely. At the end of the bottom corridor with lasers in it, there is a broken piece of wall. Destroy it, then go into the corridor that was revealed to get the Star. Collecting the star will also unlock the door.










Secret Four
There is another narrow corridor in the same area with no lasers in it, with a broken piece of wall at the end of the corridor. Shoot it to reveal another corridor, and step into the glowing light on the left to find a pair of glasses. Mind the Orc Assassins that spawn when you collect it!










Secret Five
Right before you battle The Director for the first time, you will notice a dark area with many racks in it below you. Destroy the power generator and enter the room with Kamikazes and Scrapjacks in it, then go through the narrow corridor at the bottom of the room. Enter the teleporter in the dark area to find a room with a Star and an Orc Assassin awaiting you. Going through the teleporter here will also reward you with a Big Pack.