Limiter Release
To activate the Limiter Release, press L1 + L2 + R1 + R2, then press R3 (Overboost). This will put you into Limiter Release mode for around 40 seconds. The only down side is that you get an OB Depletion indicator after the 40 seconds are up, leaving you totally powerless for 50 seconds.

Continue from Armored Core 2
Load the saved data from Armored Core 2 in the one player scenario. You will start out with all previously obtained weapons and money.