Here's the location of secret items:
1. Destroy plus escapee: On a ledge of the building about 3 levels down.
2. Guard wharf warehouse: Turn around at the start and steal the radar you are guarding.
3. Destroy fuel depot: In the 2nd room on the shelf at the back, destroy the fuel canisters, then go up there and search the rear corner.
4. Retake air cleaner: Inside a grate on the ceiling.
5. Kill struggle leader: At the bottom of the area where the floor explodes, search the rear of the floor of the chasm.
6. Exterminate organisms: Search the rear of the queen's chamber.
7. Guard freight train: Destroy one of the boxes at the loading area.
8. Destroy intruders: In a niche under the topmost bridge.
9. Guard factory entrance: In a "RED" corner of the map.
10. Secret factory recon: In a "RED" corner of the map.
11. Eliminate strikers: At the start, turn around and destroy one of the armored cars.
You can switch to a fixed camera angle by pressing Circle + X + Start.
To change the background on all menus, first make a design in the "Edit Emblem" screen when you are done hold L1 + R1 + SELECT. Now you design is the background.
First of all you need to enter into your "garage". Then, highlight the "change AC name" option and hold L2+R2 and then press and hold square for about a second then tap X. If it works the box will say change Pilot name instead of change Ac name (this is excellent if you are using the Human Plus enhancements because raven's nest changes your name when they "plus" you). Now you have a personalized name instead of "rebel"!
Start a new game, and fail all the missions you play until you are below -50,000 credits in debt. An FMV will be played, and you will start the game over with a clean slate. Doing this gives you special abilities, the first time it gives you gain the ability to throw your laser blade. The second time you receive a grid radar, the fourth time it gives you the ability to fire back weapons with huminiod legs while standing. The sixth gives you 2x energy for boosting, and weapons. Finally on the sixth time your booster drain is cut in half, thus your boosters should fire for twice as long.
If you die with more then -50,000 credits, you will become a test subject. do this six times to get all of the cheats.
The first time u will get built-in radar that can detect missils. The third time, u can fire weapons with out crouching. The last time, you will get double the booster power and your blade will shoot a shot when press x when u use it.