First Person Mode
During gameplay, hold Start + Triangle + Square. This will cause the game to pause. Next, press Start to resume the game with the new camera view.
Submitted by Hoxxley. 

Overweight Cores
Beat 'Mission Mode' and then let the credits finish to be allow you to have overweight cores.
Submitted by Hoxxley. 

Go to: Armored Core 2 Info Page | nGaming Home Page.