ACHIEVEMENT - HOW TO UNLOCK 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.