Clear the first level.
Clear the second level.
Clear the third level.
Clear the fourth level.
Clear the fifth level.
Clear the sixth level.
Earn an extra life by earning 10,000 score.
Earn a score of 25,000.
Earn a score of 50,000.
Have eight extra lives, the maximum that can be displayed.
Clear three sectors in a row without using the ZAP.
Clear a sector while constantly holding left or right.