Hidden characters:
Complete arcade mode to unlock a hidden character. Each standard character will unlock a new hidden character. After Venus is unlocked, complete the game in marathon mode to unlock Aphrodite. Venus will become unlocked after arcade mode is completed with ten different characters.
Invincible mode:
Complete arcade mode with all nineteen characters to unlock Invincible mode.
Top Collector mode:
Complete arcade mode with ten characters to unlock Top Collector mode. In this mode, you have to collect as many bras as possible as Venus.