Liberator game play                             Liberator scoring    
 star    planet      obstacle                  Target          Points
system                                         enemy spaceship   50   
  1    Earth-like    4-5 bases                 missile base     100
                     bases become satellites   satellite         20
                     killer saucer             killer saucer    150
                                               MIRV              10
  2    Earth-like    6-7 bases                 Fireball          20
                     bases become satellites   Starball          20
                     killer saucer            
                     MIRV's                   
                                              
  3    Jupiter-like  8-9 bases                
                     bases become satellites  
                     killer saucer            
                                              
  4    Jupiter like  10-11 bases              
                     MIRV's                   
                     fireballs                
                     killer saucer            
                                              
  5    Earth-lime    12-13 bases              
                     Faster planet rotation   
                     satellites               
                     killer saucer            
                                              
  6    Jupiter-like  14-15 bases              
                     Faster planet rotation   
                     Frieballs                
                                              
  7    Earth-like    16 bases                 
                     MIRV's                   
                     Satellites               
                                              
  8    Jupiter-like  16 bases                 
                     Faster planet rotation   
                     MIRV's                   
                     Fireballs                
                                              
  9    Earth-like    16 bases                 
                     master base              
                     MIRV's                   
                     Satellites               
                                              
  10   Jupiter-like  16 bases                 
                     Master base              
                     MIRV's                   
                     Fireballs                

liberator pinouts(Note these are untested, but copied from the manual!
Use at your own risk!!)

Gnd        |1 |
-sense     |22|
+sense     |21|
+5RSG      |2 |
+5RSG      |B |
-22v DC    |4 |
+12v DC    |C |
-5v  DC    |D |
+5v RTN    |A |
           |  |
10.6VDC    |18|
           |  |
Start led1 |F | 
start 1    |N |
start led2 |5 |
start 2    |11|
           |  |
fire1      |10|
shield1    |L |
+5v        |Y |
GND        |Z |
coin L     |7 |
Coin R     |8 |
           |  |
Coin Aux   |K |
coincntl L |6 |
coincntl R |H |
self test  |13|
           |  |
audio rtn  |F |
audio 2    |6 |
audio 1    |5 |
red        |3 |
green      |C |
blue       |2 |
vid ret    |D |
VCLK1      |12|
VDIR1      |N |
HCLK1      |M |
HDIR1      |11|
comsync    |7 |