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Disc1
| 1 | Video CD Rom / Enhanced CD | Gigi D’Agostino | 0:18 |
| 2 | Video "The Riddle DVD" | Gigi D’Agostino | 3:48 |
| 3 | The Riddle (video mix) | Gigi D’Agostino | 3:26 |
| 4 | The Riddle (single cut) | Gigi D’Agostino | 3:24 |
| 5 | The Riddle (original mix) | Gigi D’Agostino | 4:45 |
| 6 | The Riddle (original longer mix) | Gigi D’Agostino | 6:11 |
| 7 | The Riddle (instrumental mix) | Gigi D’Agostino | 4:09 |