Ultimate Qix.
 No.  Code  Effect
   1  ETBT-AA4Y  MASTER CODE--MUST BE ENTERED
   2  AEBT-AAH2  Start with 1 player spaceship
   3  BEBT-AAH2  Start with 9 player spaceships
With Codes 4 Thru 6 the number of ships may vary due to counter rollover.
   4  EYBT-AAH2  Start with about 25 player spaceships
   5  LEBT-AAH2  Start with about 50 player spaceships
   6  XEBT-AAH2  Start with about 99 player spaceships
   7  EJ6T-AA5A  Infinite player spaceships
   8  SFLA-DETN + AABT-AAGG  Start on round 2
   9  SFLA-DETN  Start on round 3
 10  SFLA-DJTN  Start on round 4
 11  SFLA-DNTN  Start on round 5
 12  SFLA-DTTN  Start on round 6
 13  SFLA-DYTN  Start on round 7
 14  SLFA-D2TN  Start on round 8
 15  SFLA-D6TN  Start on round 9
 16  SFLA-DATN  Start on round 10
 17  AVLA-CA2N + BJBT-AAGG  Start on round 11
 18  AVLA-CA2N + BNBT-AAGG    Start on round 12
 19  AVLA-CA2N + BTBT-AAGG  Start on round 13
 20  AVLA-CA2N + BYBT-AAGG  Start on round 14
 21  AVLA-CA2N + B2BT-AAGG  Start on round 15
 22  AVLA-CA2N + B6BT-AAGG  Start on round 16
 23  AE6T-AAHC + AE3A-AADA  Slower spaceship
 24  AN6T-AAHC + AN3A-AADA  Faster spaceship
 25  AY6T-AAHC + AY3A-AADA  Super fast spaceship
 26  9J2A-AAFT  Clear round after 25% of field is cut instead of 80%  
 27  8T2A-ACFT  Clear round after 50% of field is cut
 28  VJ2A-AEFT  Clear round after 65% of field is cut
 29  022A-AGFT  Clear round after 95% of field is cut
 30  4T2A-AGFT  Clear round after 98% of field is cut
 31  AJNT-CA2L  Start with lasers (use B button)