Load the game as usual and don't do anything until the high score screen appears. Type: "COMMANDER" (not as your name!) and then press the 'Fire' button. After a few moments press 'F10'. If your ship flickers you are now invulnerable, and have infinite expansions and smart bombs.
| 'F1' - 'F5' | Other Six Levels of "expansion" (you can still capture the capsules) |
| 'F7' | Activate the super weapons 'F1''- 'F6'. |
| 'F8' | Advance a level (There are three) |
| 'F10' | Turn cheat mode on/off |
You cannot get a high score with the cheat mode on. At the title screen, hit the 'Space' key. Now you get a screen in which you can edit a lot of the game parameters such as the speed of the enemy bullets and other stuff, with the mouse and keyboard.
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