- Nightmare mode
Successfully complete Challenge mode Stage 99 to unlock the Nightmare difficulty.

- Hard mode
Overcome the Boss on Level 5-6 (Cleavage) in Normal mode on the Normal difficulty to unlock the Hard difficulty.

- Trophies
Successfully complete one of the following tasks to get a trophy:

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

- Insane mode
Successfully complete Bonus Mode 2 to unlock the Insane difficulty.