Complete Act 1
Complete Act 2
Complete Act 3
Complete Act 4
Complete Act 5
Defeat Catwoman in Act 1
Defeat the twin statue boss
Defeat Penguin in Act 1
Defeat the strongman boss in Act 2
Defeat Catwoman in Act 2
Defeat Penguin in Act 2
Defeat the rolling clown team in Act 3
Defeat the assassin clown in Act 3
Defeat the clown on stilts in Act 4
Defeat Penguin in Act 4
Defeat Penguin in Act 5 for the final time
Defeat Catwoman for the final time
Complete the game without picking up or using the homing batarang or continues
Have 5 or more ammo for each of your gadgets [at the same time]
Complete the game with player lives set to 3 [In Options]
Have 5 blocks total in the flying meter
Complete stage 1 without your health reaching 4 blocks or lower
This is a secret achievement
Achieve a score of 750,000 or higher