Laser Invasion Game System: Nintendo System Cheat Category: Cheat Game Company: Unknown Game Category: Unknown Hint, Cheat, Walkthrough:   Laser Invasion ============== =>9 Fighters: On the Options Screen, move the cursor to PLAYERS 3. Press 3R, 3A, 3R, 3A. Now, press the combination of R then A eighteen times ( R A R A etc.). Now, press 3R. A tone will sound and 9 will appear next to PLAYERS.