# Fill Rex's armor gauge

Pause the game during a battle and press Up(2), Down(2), Left, Right, Left, Right, L1, R1. Note: This can only be done once.
# Empty Rex's armor guage

Pause the game during a battle and press Up(2), Down(2), Left, Right, Left, Right, R1, L1.
# Play as Galumn in EX mode

Defeat Juju first in Chapter 6 to unlock Galumn in EX mode.
# Play as Juju in EX mode

Defeat Galumn first in Chapter 6 to unlock Juju in EX mode.
# EX mode

Successfully complete Chapter 8 to unlock EX mode.
# Hard mode

Successfully complete the game to unlock the Hard difficulty setting.
# Bad ending

Successfully complete the game with a "C" overall rank to view the bad ending.
# Normal ending

Successfully complete the game with a "B" overall rank to view the normal ending.
# Good ending

Successfully complete the game with a "A" overall rank to view the good ending.
# Fragment of Intelligence bonuses

Successfully complete the game with the indicated number of Fragments of Intelligence to unlock the corresponding bonus:

Character Artwork: 3 Fragments of Intelligence
Chapter Titles: 5 Fragments of Intelligence
Movie Player: 7 Fragments of Intelligence
Sound Gallery: 10 Fragments of Intelligence
The 35th Platoon Chapter: 15 Fragments of Intelligence