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

Perfect Conquest: EXPERT (10 points): Cleared the game on "EXPERT" without continuing.
Weapon Master (20 points): Earned 10-dan for all weapons.
Arrival at the End (10 points): Cleared the game on "HARD" or "EXPERT".
Perfect Conquest: NORMAL (10 points): Cleared the game on "NORMAL" without continuing.
Perfect Conquest: HARD (10 points): Cleared the game on "HARD" without continuing.
Mission Complete (20 points): Cleared the game after successfully completing all of the defense and assault missions.
Court Martial (20 points): Cleared the game after failing all of the defense and assault missions.

Additionally, there are five secret achievements:

Cleaning Up Space Debris (20 points): Cleared Mission 4 without releasing the booster.
Straightism (20 points): Armed all weapon slots with lasers.
Fireworks Craftsman (20 points): Armed all weapon slots with Lv.2 rockets.
Why'd You Go? (20 points): Hit the cancel button within 5 seconds of the start of the credits.
Three Sword Style (20 points): Armed all weapon slots with swords.