Clear Stage 1 (regardless of difficulty)

Clear Stage 2 (regardless of difficulty)

Clear Stage 3 (regardless of difficulty)

Clear Stage 4 (regardless of difficulty)

Clear Stage 5 (regardless of difficulty)

Clear Stage 6 (regardless of difficulty)

Clear Stage 7 (regardless of difficulty)

Defeat the true final boss.

Clear the game with the difficulty "Very Hard"

Unlock all the in-game achievements.