A complete list of cheat codes is available at the Lego Mars Mission Fan Wiki.
| Astro level access codes: | |
|---|---|
| Level 1: | mars |
| Level 2: | powerup |
| Level 3: | niceman |
| Level 4: | buggy |
| Level 5: | flyboy |
| Level 6: | range |
| Level 7: | stomp |
| Level 8: | ufo |
| Level 9: | elton |
| Level 10: | eclipse |
| Alien level access codes: | |
|---|---|
| Level 1: | earth |
| Level 2: | zapper |
| Level 3: | extra |
| Level 4: | retreat |
| Level 5: | doctor |
| Level 6: | scramble |
| Level 7: | flow |
| Level 8: | redalert |
| Level 9: | 5050 |
| Level 10: | nightfall |