Complete the following achievements to unlock Xbox Live Gamerscore points.
Paradise Island liberated (20 points): "Paradise Island" level completed.
INKT smasher (50 points): All Gold Clean-up awards completed.
Keepin' it real (25 points): All levels completed without upgrades.
Pinky to the rescue (5 points): Blob and Pinky played a level together.
INKT informed (10 points): Pinky's Guide to Inkies completed.
Medal of Color (50 points): All story levels completed in normal mode.
Nothing but the best (100 points): All story levels completed to "S" class.
Nature Lover (50 points): All Gold Environment awards completed.
The People's Hero (50 points): All Gold Liberation awards completed.
Totally inspired (75 points): Every Inspiration pickup collected or earned.
Every picture (50 points): Every Gallery pickup collected.
Maximum Blob (25 points): Blob and Pinky completely upgraded.
Additionally there are thirteen secret achievements.
Orbital Habitats liberated (50 points): "Prison Zoo" level completed.
House of Fun liberated (40 points): "Blanc TV Factory" level completed.
Hydro Station liberated (40 points): "Inktron Collider" level completed.
Hypno Ray destroyed (100 points): "Hypno Ray" level completed.
Rocket Range liberated (75 points): "Rocket Range" level completed.
Railyards liberated (40 points): "Inky Fabricator" level completed.
Blanctown liberated (20 points): "Blanctown" level completed.
Downtown liberated (20 points): "Downtown" level completed.
Soda Falls liberated (30 points): "Blanc Cola Cannery" level completed.
State College liberated (30 points): "Comrade Black U." level completed.
The Senate liberated (30 points): "The Senate" level completed.
Blob survivor (5 points): Completed a level in a single playthrough without dying.
Piston partisan (10 points): Completed 10 continuous piston jumps.