Achievements
Complete each achievement to get the allotted gamerscore:
Demise (secret) (25) - Clear Mission - Motherstar.
Elite Troops (75) - Obtain S Rank in 60 missions.
End of the Line (secret) (25) - Clear mission - End of the Line.
Fiery Hell (secret) (25) - Clear Mission - Underground Invasion.
Groping in the Dark (secret) (25) - Clear Mission - Advance into Darkness.
Humanity's Desperate March (secret) (25) - Clear Mission - Breakthrough.
Hungry Snake (secret) (25) - Clear Mission - Star-devouring Snake.
Into the Tempest (secret) (25) - Clear Mission - Demonic Mountain.
Invitation to Death (secret) (25) - Clear Mission - Empty Death.
Missing Person Search (secret) (25) - Clear mission - Missing Person Search.
Nested (secret) (25) - Clear Mission - Mocking Laughter.
New Dawn (200) - Save the planet from the threat of invaders.
No Holding Back (secret) (25) - Clear Mission - Assault Strategy.
Odious Tracker (secret) (25) - Clear Mission - Chilly.
Rockfall Warning (secret) (25) - Clear Mission - Watch for the Fists.
Special Medal (150) - Clear all free missions.
Superhuman (150) - Learn all skills.
The Beginning of the End (secret) (25) - Clear mission - The Beginning of the End.
Towering Shadow (secret) (25) - Clear Mission - Icicle Tower.
Unequaled (50) - Defeat a total of 2,000 enemies.