http://www.netrover.com/~timt/cheats/g/galaga92.html (Amiga Plus Extra No. 5/97, 05/1997)On the title screen, type "ALIENSGOHOME" and use the following keys:
'1'----------------Add one ups
'S'------------------Add speed
'D'----------------Double shot
'F'---------Increase firepower
'N'------Advance to next level
'B'--Activate the sucker thing