In Dynasty Warriors: Gundam 3 for the PS3 and Xbox 360, there are several missions you can unlock by performing various tasks.
Here is the list of unlockable missions, and what you must do to unlock them.
Attacks From All Directions – Play through 10 missions using a Nu Gundam, Qubeley Series, Reborns Gundam, Sazabi, Strike Freedom, Turn X, or Zeong
Baptism Before God – Shoot down 1,000 enemies in The O, Gundam Mk II (Titans), or Hambrabi
Big Green Battle – Play through 10 missions using a Green mobile suit
Black Shock – Play through 10 missions using a Black mobile suit
Blue Shock – Play through 10 missions using a Blue mobile suit
Crimson Shock – Play through 10 missions using a Red mobile suit
Deformed Mobile Suits – Play through 10 missions using a Bound Doc, Epyon, Gaza C, Gaza D, Hambrabi, Wing Gundam, or Zeta Gundam
Feet? What Are They Good For? – Play through 10 missions using a Ball or Zeong
Fight! King Of Hearts! – Shoot down 1,000 enemies in a Burning Gundam or Master Gundam
For The Dialogue That Should Come – Shoot down 1,000 enemies in a 00 or Reborns Gundam
Freedom, Justice, and Fate – Shoot down 1,000 enemies in a Strike Freedom, Infinite Justice, or Destiny
Heroes Of The One Year War – Shoot down 1,000 enemies in a Ball or GM
Marine Mayhem – Play 10 missions in an Acguy, Kapool, or Z’gok Series
Mother Space – Shoot down 1,000 enemies in a Qubeley or Qubeley Mk II
Pedigree Of The White Devil (1) – Shoot down 1,000 enemies in a Nu Gundam
The Moon Will Always Be There – Shoot down 1,000 enemies in a Double X, Turn A, or Turn X
The Sword Which Disrupts The Age – Shoot down 1,000 enemies in an Epyon or Tallgeese II
White Shock – Play through 10 missions using a White mobile suit
Wings That Fly Toward The Future – Shoot down 1,000 enemies in a Deathscythe, Heavyarms, or Wing Gundam
Yellow Shock – Play through 10 missions using a Yellow mobile suit, and clear all other color based missions