Run Soccer 98 Pinball, then press 
[Left] C [Down] C [Up] C [Down] [Up] [Left] C [Right] C [Left] 
at the language selection screen. A sound will confirm code entry. 
During game play, quickly press [Left] [Right] [Up] [Down] [Left] 
until the Launch Ball appears. Press A + [Up] to display the passwords 
dialog box; then enter one of the following passwords to activate 
the cheat function. 

Select any game, then press G on your keyboard. Wait until the logo 
disappears, press G again, press N (on the options screen during game play), 
then select any team costumes (or start a new game). 
Then, press A + [Up] to display the passwords dialog box screen.

Effect                      Password 
------------------------------------
Extra ball                - ARSENAL  
Quick multiball           - BRAZIL  
Super Spinners            - ENGLAND  
Power Flippers            - SOUTHPORT  
Super Spiral              - CAMELOT  
Rollercoaster Tycoon demo - TRACKS  
Debug mode                - IMGOINGNOW  
Rollercoaster Pinball     - COASTERS  
Rollcage Stage 2 demo     - PARTNERS  
Expert mode               - TIMETOLOSE  
Easy mode                 - TIMETOWIN  
Hard mode                 - DIFFICULT  
Show memory information   - DOG