These become available options when you complete the indicated task for the corresponding character in Official mode.

Amuro (Encounters in Space):
Do not let Kai or Hayato to be defeated.

Char (Prelude to Counterattack):
Defeat Scirocco before Kamille talks to him.

Judau (A New Journey):
Defeat Haman after their conversation ends.

Judau (Meeting Again):
Defeat Haman before their conversation ends.

Char (At the End of the Battle):
Let Kamille talk to Scirocco before defeating him.

Amuro (Escape):
Before completing the mission allow Kai and Hayato to be defeated.

Kamille (Love is the Pulse of the Stars):
Save Radish from Yazan, Save Emma from Reccoa and allow Colony Laser to fire.

Complete the following tasks in Mission mode to unlock the corresponding bonus mission.

Unlock Forced Evolution:
Complete any 5 missions in Mission mode.

Unlock Yazan's Crew Test:
Read Yazan's Terminal message as a current (not former) member of Titans.

Play as any character in Mission mode and complete the mission 'The True Dynasty Warriors: Gundam'. When you have done this view the accompanying Terminal message and ALL the Rank 4 parts for ALL the Class 1 Mobile suits will be available for selection.

Make ALL the playable characters in Mission mode either Newtypes or Cyber-Newtypes to unlock this movie in Gallery mode.

When you beat Official mode as Char Aznable (CCA Version) a different menu screen will appear.

A different menu screen will appear when you beat 'Official' mode as Amuro Ray (CCA Version).

When you beat ALL 5 Story missions in Mission mode using the indicated characters alternative costumes become available options for the correponding character. To select the alternate costume you must highlight the character with a customer in the 'Character Select' screen and press Y.

Unlock Laura Rolla Alternate Costume:
Beat ALL 5 Story missions in mission mode using Loran Cehack.

Unlock Zech Merquise Alternate Costume:
Beat ALL 5 Story missions in mission mode using Milliardo Peacecraft.

A Premium Theme for your Xbox dashboard becomes available when you have completed the game.

The following playable characters become available when you Complete the indicated task in Mission mode and read the new mail in the Terminal.

Unlock Cecily Fairchild:
Complete Seabook Arno's story missions.

Unlock Reccoa Londe:
Play as Yazan Gable and shoot down Reccoa in any mission.

Unlock Dozle Zabi:
Accept invitation to join Zeon and clear the missions given.

Unlock Hayato Kobayashi:
Have good relations with Hayato and clear his friendship mission.

Unlock Kai Shiden:
Have good relations with Kai and then clear his friendship mission.

Unlock M'Quve:
Read a request mail from Kycillia while joining Zeon and clear the mission given.

Unlock Glemy Toto:
Help Glemy establish his own faction while joining Axis and then clear the mission given.

Unlock Gyunei Guss:
Play as Quess Paraya and read Gyunei's mail to unlock his friendship mission. Then clear it.

Unlock Sarah Zabiarov:
Have good relations with Scirocco and Sarah, bad relations with Reccoa. Then read Sarah's mail and clear the mission given.

Unlock Gym Ghingnham:
When you have joined Dianna Counter have at least normal relations with Gym to recieve a mail. Then clear the mission given.

Unlock Four Murasame:
Unlock Four's friendship mission by completing Kamille Bidan's story missions and reading the new mail and then clear it.

Unlock Lacus Clyne:
Clear Kira Yamato & Athrun Zala's story missions, and read Lacus' mail in Kira's terminall. Then clear the mission given.

Unlock Lunamaria Hawke:
Clear Shinn Asuka's story mission and read Lunamaria's mail; Zaku II CA license is required to clear the mission.

Unlock Quess Paraya:
Play as a non-Newtype and build up relation with Quess until you receive mail from her. Then make the character a Newtype.

Unlock Ramba Ral:
Befriend Ramba Ral and read a request mail from Dozle while joining Zeon. Then clear the mission given.

Unlock Rosamia Badam:
Have best relations with Kamille after joining Aeug. Read his mail and then clear the mission given.

Unlock Sleggar Law:
Play as a female character and have good relations with Sleggar. Read his mail to unlock his friendship mission and then clear it.

Unock Yazan Gable:
Join the Titans and have good relations with Yazan. Then read his mail and clear the test mission given.

Unlock Katejina Loos:
Have good relations with Katejina and read her mail to unlock her friendship missions. To clear the missions a V2 Gundam license is needed.

Complete the indicated level to unlock the corresponding gamerpic.

Unlock Gamerpic 1:
Complete the 'Crash Site' level.

Unlock Gamerpic 2:
Complete the 'Dirtlands' level.

When you complete Amuro Ray's story in Char's Counterattack an alternate title screen becomes available.