Assault

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. . . . . . . 
CA281 A S S A U L T (TM)

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

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DISPLAY
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___________________________________
Score(6 Digits) -|------------- 000900 | 
| _______________________________ |
| _/O\_ |
| <_____> ------|---------- Mothership
| \/ \/ |
| === | 
| <-O-> === --------|- Alien-laying effect
| ... . === | 
Weapon ----------|---- V . <-O-> -------|-------------- Aliens
| <-O-> . |
| .---------------|-Missiles from cannon
| . | 
| . | 
| A --------------|-------------- Cannon
Base ------------|--_______________________________ | 
Chances left ----|--- ^^^ TEMP ===== ----|----- Temperature bar
|___________________________________| 



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JOYSTICK CONTROL
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(1) Without using the push button.

(Vertical missile firing) 
Forward 
/|\
|
_____
Left |o | Right
(Cannon moves towards left) <--- | (O) | ---> (Cannon moves towards right)
|_____|



(2) With push button pressed.

(Vertical missile firing)
Forward 
/|\
|
_____
Left |o | Right
(Left missile firing) <--- | (O) | ---> (Right missile firing)
|_____|


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BRIEF DESCRIPTION
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(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.


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GAME PLAY
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(1) The player can fire at the attacking aliens both vertically or horizon-
tally 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.

[HINT:- If you can avoid firing the cannon unnecessarily then the cannon 
will cool down. Before destroying the last Alien in a "page" allow the 
cannon to cool off: this will give you a good start on the next level.]