Complete all Gotham City - Part I levels in a row.
Complete all Fluegelheim Museum levels in a row.
Complete all Axis Chemical Factory levels in a row.
Complete all Gotham City - Part II levels in a row.
Defeat Gymnast Joker Goon at Cathedral level.
Defeat Lawrence at Cathedral level.
Finish the game.
Complete all levels in a row.
Have your batarang fully upgraded along with Batman's speed
Score 10000 points to earn a extra life
Score 25000 points to earn another life
Score 40000 points to earn another life
Score 55000 points to earn another life
Score 70000 points to earn another life
Score 85000 points to earn another life
Score 100000 points to earn another life
In one life, clear area 1-1 having at least 2:20 on the clock
In one life, clear area 2-1 having at least 2:20 on the clock
In one life, clear area 4-1 having at least 2:20 on the clock
In one life, clear area 3-1 having at least 2 minutes on the clock
You've reached 9 lives