BOMB INTRODUCE A COMPLETE SERIES OF UP-DATED VIDEO GAME CARTRIDGES
 

JOYSTICK CONTROL

(1) Without using the push button.
Up: Fire Missile Up
Left: Move Left
Right: Move Right

(2) With push button pressed.
Up: Fire Missile Up
Left: Fire Missile Left
Right Fire Missile Right
 

BRIEF DESCRIPTION

(1) At first, a mothership that cannot be destroyed moves along the screen.

(2) In each page, mothership will lay a total of ten aliens in the space.

(3) In different pages, the aliens will have different ways of movements:
(i) Horizontal movement with sudden change of direction.
(ii) Up-down + horizontal movement with sudden change of direction.
(iii) Sudden appearance at random locations for a short while.

(4) The alien at the lowest region will emit different kinds of weapons at different pages:
(i) Single missile
(ii) Groups of missiles
(iii) Laser
(iv) Fireballs

(5) There are several kinds of aliens, namely
(i) Large alien that cannot disintegrate
(ii) Large alien that can disintegrate into two small aliens

(6) Different aliens & weapons with different speeds & movements in different pages.

(7) Fireballs reaching the base will attack cannon horizontally.
 

GAME PLAY

(1) The player can fire at the attacking aliens both vertically or horizontally by means of skilful control of the cannon.

(2) The weapons emitted by the aliens cannot be destroyed, with the exception of the horizontal moving fireballs.

(3) The cannon will be destroyed either by
(i) colliding with the weapons or
(ii) over heating as indicated by the temperature ball.

(4) Game over in either cases:
(i) Full score attained (ie. 999999)
(ii) All cannons are destroyed

(5) A bonus cannon will be awarded for every 10000 marks, with a maximum of 4 chances.