Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

First Steps (5 points): Successfully complete the first level of the game.
Wonder (25 points): Successfully complete the first Act of the game.
Fear (25 points): Successfully complete the second Act of the game.
Courage (30 points): Successfully complete the third Act of the game.
Firefly Collector (15 points): Collect 100 fireflies.
Firefly Enthusiast (15 points): Collect 500 fireflies.
Firefly Lover (15 points): Collect 1,000 fireflies.
Firefly Master (30 points): Collect 1,500 fireflies.
Cleaning Up (10 points): Collect all the fireflies in "Every Kite Soars" in a single run.
Shy of the Firefly (10 points): Successfully complete "Deep Sleep Dive" without collecting any fireflies.
Mastering the Underground (10 points): Successfully complete all bonus levels.
Ouch Free (10 points): Successfully complete "All Around is Petrified" without taking any damage.