International Karate Game System: Commodore C-64 Cheat Category: Cheat Game Company: System 3 Game Category: Action Hint, Cheat, Walkthrough:   International Karate ==================== To change the background - press and hold A+D+Z+M (in that order). The keys S+E makes both players stop fighting and look at you. You can still control your player though. Good for beating the CPU player. The game can run at 4 different speeds. Press X+[1-4] to choose speed: 1 = fastest, 4 = slowest.