Starfire

At the startup screen, press [F4].
You will get a password prompt.
Enter: DONTKILLME

Guess what it does.

* Or: Use the level passwords:
2 : JRBIFKKEAU
4 : MFHRISLSOR
6 : KSDURMOSEE

<Contr. (c)(R)TM> (Information from Cheat Machine)