Defeat the Boss on Level 5-6 (Cleavage) in Normal mode on the Normal difficulty to unlock the Hard difficulty.Insane mode
Successfully complete Bonus Mode 2 to unlock the Insane difficulty.Nightmare mode
Successfully complete Challenge mode Stage 99 to unlock the Nightmare difficulty.Trophies
Successfully complete one of the following tasks to get a trophy:
- Classic UFO Hunter (Bronze): Eliminate all UFOs in Stage 0.
- High Score Of 10,000,000 (Bronze): Acquire a high score of 10,000,000.
- 1,500 Chained (Bronze): Achieve a chain of 1,500.
- 1,000 Nagoya Attacks (Bronze): Perform 1,000 Nagoya Attacks in a single stage.
- Music Fan (Bronze): Play Music Mode 10 times.
- Easy Difficulty Clear (Bronze): Beat Normal Mode on Easy.
- Normal Difficulty Clear (Bronze): Beat Normal Mode on Normal.
- Hard Difficulty Clear (Silver): Beat Normal Mode on Hard.
- Insane Difficulty Clear (Silver): Beat Normal Mode on Insane.
- Challenge Mode Clear (Silver): Beat all 99 stages in Challenge Mode.
- Continue-Free Clear (Silver): Beat Normal Mode without using any continues (on any difficulty level with any number of ships).
- Nightmare Difficulty Clear (Gold): Beat Normal Mode on Nightmare.