Tracklist Hide Credits
| 1 | Challenger | 5:19 |
| 2 | Jamin | 5:57 |
| 3 | Happy Birthday (To My Mammy) | 4:57 |
| 4 | Happy Song (Remix) | 5:37 |
| 5 | My Little Japanese Boy | 4:23 |
| 6 | Step By Step | 4:33 |
| 7 | America | 4:32 |
| Bonus: | ||
| 8 | Challenger (Swedish Remix)Remix [Uncredited] – Fredrik Ramel |
5:29 |
| 9 | Ice Cream | 5:21 |
| 10 | Disco Maniac | 5:37 |
| 11 | Happy Song (Maxi Version '83) | 5:35 |
| 12 | Let's Dance In The Music | 4:45 |
| 13 | America (Swedish Remix)Remix [Uncredited] – Fredrik Ramel |
6:40 |
| 14 | Happy Song (Radio Edit) | 3:22 |
Companies, etc.
- Phonographic Copyright (p) – ZYX Music
- Copyright (c) – ZYX Music
Credits
- Written-By – Spagna, I.* (tracks: 1-8, 11, 13-14), Pignagnoli, A.* (tracks: 1-3, 5-8), Abacab* (tracks: 4, 11, 14), Artioli, M.* (tracks: 10), Limoni, M.* (tracks: 10, 12), Bacciocchi, O.* (tracks: 4, 9, 11, 13-14), Cundari, S.* (tracks: 12), Semplici, V.* (tracks: 10, 12)
Barcode and Other Identifiers
- Barcode (String): 090204695867
- Barcode (Text): 0 90204 69586 7
- Rights Society (On Rear Cover & CD): mcps
- Rights Society (On CD): BIEM
- Label Code: LC 06350
- Mastering SID Code: IFPI L553
- Mould SID Code: IFPI 94K1
- Matrix / Runout: ZYX Music ZYX23017-2 23 A00
- Other (file under): Italo Disco
Other versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| ME LP 002 | Baby's Gang | Challenger (LP, Album) | Memory Records | ME LP 002 | Italy | 1985 |
| ZYX 23017-1 | Baby's Gang | Challenger (Deluxe Edition) (LP, Album, 180) | ZYX Music | ZYX 23017-1 | Germany | 2016 |
| SIS 1159-2 | Baby's Gang | Challenger (CD, Album, RM) | Silver Star | SIS 1159-2 | Europe | 2010 |
| MT 711507-146-1 | Baby's Gang | Challenger (CD, Album) | Монолит | MT 711507-146-1 | Russia | 2005 |
| BBK 9009 | Baby's Gang | Challenger (Cass, Album) | Beat Box | BBK 9009 | Sweden | 1985 |

