Achievements

Complete each achievement to get the allotted gamerscore.
Unlockable ....................... How to Unlock
All Stages Cleared (Easy) (50) ... Clear all stages on easy difficulty.
All Stages Cleared (Hard) (150) .. Clear all stages on hard difficulty.
All Stages Cleared (Hardest) (200) Clear all stages on hardest difficulty.
All Stages Cleared (Inferno) (300) Clear all stages on inferno difficulty.
All Stages Cleared (Normal) (100)  Clear all stages on normal difficulty.
All Weapons Aquired (200) ........ Aquire all weapons.

Unlockable Bonus Weapons

Beat every mission on a certain difficulty to unlock the corresponding weapon.
Unlockable ....................... How to Unlock
Genocide Gun ..................... Beat all missions on Inferno.
PX50 Bound Shot .................. Beat all missions on Hardest.
Y20 Impulse ...................... Beat all missions on Hard.
ZE Launcher ...................... Beat all missions on Normal.
Zero Laser Rifle ................. Beat all missions on Easy.