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

Classic UFO Hunter (10 points): Eliminate all UFOs in Stage 0.
High Score Of 10,000,000 (10 points): Acquire a high score of 10,000,000.
1,500 Chained (10 points): Achieve a chain of 1,500.
1,000 Nagoya Attacks (10 points): Perform 1,000 Nagoya Attacks in a single stage.
Music Fan (10 points): Play Music Mode 10 times.
Easy Difficulty Clear (10 points): Beat Normal Mode on Easy.
Normal Difficulty Clear (15 points): Beat Normal Mode on Normal.
Hard Difficulty Clear (20 points): Beat Normal Mode on Hard.
Insane Difficulty Clear (20 points): Beat Normal Mode on Insane.
Challenge Mode Clear (20 points): Beat all 99 stages in Challenge Mode.
Continue-Free Clear (25 points): Beat Normal Mode without using any continues (on any difficulty level with any number of ships).
Nightmare Difficulty Clear (40 points): Beat Normal Mode on Nightmare.