Neutral Zone

The player is taken to the outer edges of the galaxy, and their mission is to
protect Alpha IV from alien ships who are attacking it. The game can be played
up to five levels; and the higher the level, the more ships players have to
destroy. The ships vary in their size, speed, and destructive capability. Not
only do they attack Alpha IV, but they also attack your weapons pod, so the
point is to wipe them out before they have a chance to attack.

Missiles are fired at the ships from the weapons pod which rotate through 360
degrees. The control panel shows where the attacking ship is, leaving the
player to find it and destroy it. Only one ship attacks at any time and it
continues to attack until the ship is either destroyed or the time limit
expires. If the ‘Turrent Damaged’ message appears, traversing will be slow
until the self repair systems fixes the damage, giving the ships more chance
to continue their attack on Alpha IV.

If all the ships have been wiped out, the player is returned to the title
screen to select a new game. On harder levels, missiles that come from alien
ships have a disturbing frequency and precision.