Successfully complete one of the following tasks to get a trophy:
INKT informed (Bronze): Pinky's Guide to inkies completed.
Pinky to the rescue (Bronze): Blob and Pinky played a level together.
Keepin' it real (Bronze): All levels completed without upgrades.
Paradise Island liberated (Silver): 'Paradise Island' level completed.
Maximum Blob (Silver): Blob and Pinky completely upgraded.
Every picture (Silver): Every Gallery pickup collected.
Totally inspired (Silver): Every inspiration pickup collected or earned.
INKT smasher (Gold): All Gold Clean-Up awards completed.
The People's Hero (Gold): All Gold Liberation awards completed.
Nature Lover (Gold): All Gold Environment awards completed.
Nothing but the best (Gold): All story levels completed to 'S' class.
Medal of Color (Gold): All story levels completed in normal mode.
Platinum (Platinum): All Trophies obtained!
Additionally, there are 13 secret trophies:
Blob survivor (Bronze): Completed a level in a single playthrough without dying.
Piston partisan (Bronze): Completed 10 continuous piston jumps.
Blanctown liberated (Bronze): "Blanctown" level completed.
Downtown liberated (Bronze): "Downtown" level completed.
Soda Falls liberated (Bronze): "Blanc Cola Cannery" level completed.
State College liberated (Bronze): "Comrade Black U." level completed.
The Senate liberated (Bronze): "The Senate" level completed.
Orbital Habitats liberated (Silver): "Prison Zoo" level completed.
House of Fun liberated (Silver): "Blanc TV Factory" level completed.
Hydro Station liberated (Silver): "Inktron Collider" level completed.
Railyards liberated (Silver): "Inky Fabricator" level completed.
Rocket Range liberated (Silver): "Rocket Range" level completed.
Hypno Ray destroyed (Gold): "Hypno Ray" level completed.