Cheat Mode
Press B, A, B, Y, B, Y, L, A, R, A, Start at the title screen. A cheat menu with mission/area, sound test, and invincibility options will appear.

View Good Ending Sequence
Enter SPACEACE as a password.

Passwords

System        Password  
McAuliffe     1RCCMCBLGW  
Gimli         1HCWFKVMZH 
Dakota        DHDKCCWBRC 
Kurasawa      JHFHTFYMCO  
Venice        DGNWP2XCLW