Go to the options screen and enter one of the following passwords:
| Password | What It Does |
| 267776 | 8 Credits |
| 220969 | Start with 9 ships |
| 180771 | Invisible ship |
| 713948 | Start on level 2 |
| 900277 | Start on level 3 |
| 213490 | Start on level 4 |
| 866141 | Start on level 5 |
| 321904 | Start on level 6 |
| 196861 | Start on level 7 |
| 040186 | Start on level 8 |
| 841003 | Start on level 9 |
| 216409 | Start on Criticus |
| 300167 | End sequence |
| Infinite Energy Player 1 | 801E997E 008C |
| Infinite Energy Player 2 | 801E9B1E 008C |
| Infinite Bombs Player 1 | 801EBC8C 0003 |
| Infinite Bombs Player 2 | 801EC32C 0003 |
