Bronze

Official Mode: 1 Character
Clear Official Mode

Mission Mode: 1 Character
Clear Mission Mode using 1 character.

Mission Mode: 5 Characters
Clear Mission Mode using 5 characters.

Mission Mode: 10 Characters
Clear Mission Mode using 10 characters.

All Giant Mobile Armor Destroyed
Destroy all Giant Mobile Armors.

Total Shot Down: 10000
Total Shot Down in Player Record exceeds 10000.

Total Missions: 100
Total Missions in Player Record exceeds 100.

Character Gallery Complete
Complete the Character Gallery.

Mobile Suit Gallery Complete
Complete the Mobile Suit Gallery.

Battle Ship Gallery Complete
Complete the Battle Ship Gallery.

Movie Gallery Complete
Complete the Movie Gallery.

Love is the Pulse of the Stars  (Secret)
Watch Kamille’s ending movie “Love is the Pulse of the Stars”.

Achieved 50 Ace points  (Secret)
Will be unlocked after achieving 50 Ace points.

Achieved 100 Ace points  (Secret)
Will be unlocked after achieving 100 Ace points.

Silver

Official Mode: All Characters
Clear Official Mode with all characters.

Mission Mode: 15 Characters
Clear Mission Mode using 15 characters.

Pilot Level MAX
Achieve Pilot Level 50 with at least one character.

Total Shot Down: 100000
Total Shot Down in Player Record exceeds 100000.

Total Missions: 200
Total Missions in Player Record exceeds 200.

Skill Complete
Complete all Skills for any one character.

License Complete
Complete all Licenses for any one character.

Zaku Tank, Lord of Land  (Secret)
View the Terminal Event, [Lord of Land].

Ball, King of Space  (Secret)
View the Terminal Event, [King of Space].

Achieved 500 Ace points  (Secret)
Will be unlocked after achieving 500 Ace points.

Gold

Mission Mode: All Characters
Clear Mission Mode with all characters.

All Missions Cleared
Clear all missions in Mission Mode.

Playable Characters Complete
Acquire all playable characters.

Playable Mobile Suits Complete
Acquire all playable Mobile Suits.

Rank 4 Parts Released
Release Rank 4 part for all the Mobile Suits.

All Friendship  (Secret)
Achieve “Friendship” with all characters.

Platinum

100% of Trophies Obtained!
100% of trophies obtained in Dynasty Warriors: Gundam 2

Edit: Formatting, added Platinum, marked secret trophies. Source http://www.ps3trophies.co.uk/. ~Watchful