Enter these codes at the password screen to play each level and start with nine lives:

• Africa Level 1: 1431
• Africa Level 2: 3731
• Africa Level 3: 6937
• Africa Level 4: 9701
• Asia Level 1: 1123
• Asia Level 2: 6831
• Asia Level 3: 0377
• Asia Level 4: 4267
• Asia Level 5: 8099
• Europe Level 1: 3163
• Europe Level 2: 3204
• Europe Level 3: 3198
• Europe Level 4: 5941
• North American Level 1: 2405
• North American Level 2: 7069
• North American Level 3: 5607
• North American Level 4: 1525
• North American Level 5: 9319
• Nuclear warning, level 1: 1293
• Nuclear warning, level 2: 4154
• South East Asia Level: 1379
• South East Asia Level: 7460
• South East Asia Level: 8804
• The capital is under attack, level 2: 0801
• The capital is under attack, level 3: 5779
• The capital is under attack, level 4: 1729