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Disc1
| 1 | The Riddle (Vocal Radio Edit) | Gigi D’Agostino | 3:37 |
| 2 | The Riddle (Vocal Club Mix) | Gigi D’Agostino | 6:08 |
| 3 | The Riddle (Tanzen EP Mix) | Gigi D’Agostino | 6:12 |
| 4 | The Riddle | Gigi D’Agostino | 3:24 |
| 1 | The Riddle (Vocal Radio Edit) | Gigi D’Agostino | 3:37 |
| 2 | The Riddle (Vocal Club Mix) | Gigi D’Agostino | 6:08 |
| 3 | The Riddle (Tanzen EP Mix) | Gigi D’Agostino | 6:12 |
| 4 | The Riddle | Gigi D’Agostino | 3:24 |