Complete The Game
Play through the final scene of Gunstar Heroes.
You basically get this when you beat Golden silver, there is going to be a cut scene, just play through it in your ship, fly around watch the cut scene and you've beat Gunstar Heroes
Defeat superboss Golden Silver.
Hardest boss in the Game, the best weapon I found for it is green green, and just shoot away while focusing on dodging his attacks.
Like the fight in the mines, use green green again and it is yours!
Defeat Black Fly.
Pity boss, just use green green, focus on dodging, easy trophy.
Defeat Bravoo Man in the Ancient Ruins.
Rescue Yellow by defeating Smash Daisaku.
Another boss battle, just use green green, focus on dodging attacks.
Defeat Crab Force in the Underground Mine.
Bit more tricky, on normal mode green will transform 3 times, if he doesn't look like the above trophy image above on the 3rd time he transforms, let him kill you and keep trying the fight over till you get the crab
yet again use green green to kill him.
You can play it on insane mode and face all of Green's transformations, ensuring you get Crab Force
Locked and Loaded
Begin the game with each weapon.
When you start a NEW GAME, the doctor will prompt you to choose a weapon, just pick one, quit, restart, then start another game with a different weapon, repeat for the rest.
Not Quite Red
Defeat Orange on the Flying Battleship.
Another boss fight, use green green, focus on dodging.
OMG 11 Bosses
Complete the Dice Palace and defeat Black Beat Stepper.
Obtained when you get to the palace, and you see a boardgame on the screen, just melee the dice.
You DON'T have to land on all the boss tiles, just finish the level.
Defeat Papaya Dance in the Ancient Ruins.
Defeat Pinky Roader in the Ancient Ruins.
In the level Ancient Ruins, there are 2 mini bosses and the boss Pink,
use green green on all of them, the mini bosses are a piece of cake, but Pink may give you a hard time.