On the level/player selection screen, move the mouse to the crystal at the top
 of the Apocalypse logo. Imagine the mouse buttons are numbered like this:
 'SELECT' 1 'MENU'   2 'ADJUST' 4 Holding down various combinations of buttons
 activates a different numbered cheat mode, according to the sum of the held
 down buttons. The cheat mode levels run from 1 to 7, although 5 to 7 are the
 same. As the cheat levelgets higher so the better the cheats become. On all
 cheat levels you can select any planet to start at. At cheat levels 3 and
 higher the shield charge increases, at levels 3 and higher you have rapid
 fire, and the gun temperature cooler improves in cheat levels up to 4. It is a
 bit tricky to select any particular level, so a way to get cheat level 5 (the
 best) is to press [Z] to continue instead of [SPACE] when you insert the
 levels disc.

  - Level skip -

 During the game, hold down [SHIFT] and type in 'ELIZA' to go to the next level.

 Submitted by : Isimsiz Kahraman 2