| Official |
|---|
| Second Toughest in the Infants | Underworld | 2×CD | 8 + 2 | | Logic Records (UK), Logic Records | 74321 34509 2, LOC 187 | 743213450926 |
| Second Toughest in the Infants | Underworld | CD | 8 | | Junior Boy’s Own | jbocd4 | 5026734000524 |
| Second Toughest in the Infants | Underworld | 2×CD | 8 + 2 | | Junior Boy’s Own | 484188 2 | 9399700017816 |
| Second Toughest in the Infants | Underworld | CD | 8 | | TVT Records, Wax Trax! Records | TVT 7240-2 | 016581724020 |
| Second Toughest in the Infants | Underworld | 2×12" Vinyl | 3 + 5 | | Junior Boy’s Own | JBO LP 4 | 5026734000517 |
| Second Toughest in the Infants | Underworld | 2×CD | 8 + 4 | | Junior Boy’s Own | SRCS 8031, SRCS 8032 | 4988009803197 |
| Second Toughest in the Infants | Underworld | CD | 8 | | TVT Records, Wax Trax! Records | TVT 7240-2 | 016581724020 |
| Second Toughest in the Infants | Underworld | CD | 8 | | Junior Boy’s Own | JBO1002002 | 5033197020020 |
| Second Toughest in the Infants | Underworld | 2×CD | 8 + 3 | | Junior Boy’s Own | V2CI 109-110 | 4520227010928 |
| Second Toughest in the Infants | Underworld | CD | 8 | | UMC | uwr00053 | 602547460653 |
| Second Toughest in the Infants | Underworld | Digital Media | 8 | | Smith Hyde Productions , UMC | 00602547475954 | 602547475954 |
| Second Toughest in the Infants | Underworld | 2×CD | 8 + 10 | | Universal | uwr00052 | 602547460707 |
| Second Toughest in the Infants | Underworld | 4×CD | 8 + 9 + 10 + 7 | | UMC | uwr00051 | 602547460752 |
| Second Toughest in the Infants | Underworld | 4×Digital Media | 8 + 9 + 10 + 7 | | Smith Hyde Productions | [none] | 00602547476081 |
| Second Toughest in the Infants | Underworld | 2×12" Vinyl | 3 + 5 | | Universal | uwr00054 | 602547460837 |
| Second Toughest in the Infants | Underworld | 2×Digital Media | 8 + 10 | | Smith Hyde Productions | [none] | [none] |