- Dark Star and armor upgrades
Walk in a circle in the main room of Atlantis with ASE. Scan all possible items to get the Dark Star and armor upgrades.

- Activate Cheats
Enter the 'Extras' menu, select the 'Promotional Codes' option, then enter one of the following codes to obtain the corresponding effect:

Eye Of Ra ASE Enter 'EYEOFRA' as a code to unlock Eye Of Ra ASE.
Golden Destroyer Armor in Multiplayer mode Enter '14KARMOR' as a code to unlock the Golden Destroyer Armor in Multiplayer mode.

- Achievements
Successfully complete the indicated task to unlock the corresponding achievement:


- Hive Cannon
From the Atlantis hub program, use the Conduit to go to Oxford University. When you arrive, look to the right to see a rock pillar. Jump to it, then use the ASE on the scannable object in the middle to get the blueprints for the Hive Cannon.

- Longer fire and invisibility time with AR-C Eclipse
When using the AR-C Eclipse (the gun that can turn you invisible), before turning invisible for getting past turrets or enemies, shoot the gun until it is almost overheated. Then, charge it up so you turn invisible. The gun will need time to cool down before lowering its temperature below zero. This will allow you to remain invisible for longer. This also applies to the shooting feature. If you need to shoot for long periods of time, turn invisible until the temperature is almost at its minimum, then begin shooting. You will be able to keep firing for a longer time.

- Easy 'Green Ooze' achievement
Play the Washing D.C. level. Go to the trailer, and fall down the ladder to the sewer. Kill both mites in the room, then aim your reticule at the canister of Green Ooze with tiny footprints going into the sewer water.