1. ABEA-EADY - Start with 0 grenades

2. NPEA-EADY - Start with 99 grenades

3. AAEA-EAFG - Infinite grenades

4. AKEA-EADW - Start with 3 lives

5. NPEA-EADW - Start with 99 lives

6. AA5A-EAH6 - Infinite lives

7. NPEA-EADT - Start with 99 continues

8. AA5T-EAD2 - Infinite continues

9. NPEA-EAD0 - Start with 99 alien grenades

10. AAEA-EAE2 - Infinite alien grenades

11. C27A-CA6W + BT7T-CA3E - Protects against most enemies

12. AA5T-EAC4 - Don't lose energy when you fall off screen

13. ACHT-CAHL - Protection against floor spikes

14. A0NA-AAHC - Pick up five mission objectives for each 1 you get

15. ACBT-CAHE - Extra life worth nothing

16. ALBT-CAHE - Extra life worth 2

17. ACBT-CAGR - Energy icon does nothing

18. JCBT-CGGR - Energy icon restores energy to full

19. ADXT-CAGA - Machine gun does not heat up

20. LDXT-CAGA - Machine gun heats up quicker

21. RHXT-C61A - Machine gun cools off instantly

22. AC0T-AAG0 - Invincible after you get hit

1, 2	1. - Start with no grenades, Start with 99 lives, Infinite continues, Start with 99 alien grenades, Infinite alien grenades, Protects against most enemies. 2. Start with 0, 99 grenades, Infinite grenades, Start with 3, 99 lives, Infinite lives, Start with 99 continues, Start with 99 alien grenades, Infinite alien grenades, Protects against most enemies, Don't lose energy when you fall off screen,
Protection against floor spikes, Pike up five mission objectives for each 1 you get, Extra life worth nothing, 2, Energy icon does nothing, restores energy to full, Machine gun does not heat up, heats up quicker, cools off instantly, Invincible after you get hit.