Unlock Bonus parts:
Advanced Chips: Complete Stage EX 1 of the Prologue
Expert Chips: Complete Stage Stage EX 2 of the Prologue
Moon Shadow OKE Fuselage: Complete Stage Stage 6 of the Prologue 

Hardware Design options:
     You  can  unlock  the  following  options  at the Hardware Design
screen by completing the indicated stages.

Unlock Armament option: Complete Stage 4 of the Prologue.
Unlock Armor option: Complete Stage 6 of the Prologue.
Unlock CPU option: Complete Stage 5 of the Prologue. 
Unlock OKE Tuning option: Win all 20 Premium Battles.

Unlock Simulation option in OKE Design menu:
     Finish Stage 3 of the Prologue.

Unlock Team Formation option in Briefing menu:
     Finish Stage 7 of the Prologue.

Unlock Scenario Mode and Battle Mode options:
     Finish Stage 9 of the Prologue.

Unlock BGM Select in Battle Mode menu:
     Reach a "Gold" rank in all 20 Premium Battles.