International Karate Plus Game System: Commodore Amiga Cheat Category: Cheat Game Company: Unknown Game Category: Unknown Hint, Cheat, Walkthrough:   International Karate Plus When you are knocked to the floor, pause the game (space) and unpause again (space). You will now be invulnerable. Be careful!, this works for the computer, too! Codes to type in while playing- FREZ Freeze the game PAC Pacman moves across screen FISH Makes a fish leap out of water BIRD Bird flies across screen PERI periscope rises out of water Other words that cause effects are: ANBK ANGL EDHK FOOK GLZP GPZP SHAH SIMR STEW SUNL TOTO Typing FUCK and CUNT results in an interesting message.