Versions
| Title, Format | Label | Cat# | Country | Year | |
|---|---|---|---|---|---|
| Challenger (12", Gat) | Memory Records | MEMIX 027 | Italy | 1984 | |
| Challenger / Happy Birthday (To My Mammy) (12") | Carrere | 8553 | France | 1984 | |
| Challenger / Happy Birthday (To My Mammy) (7") | Memory Records | MEM 45014 | Italy | 1984 | |
| Challenger / My Little Japanese Boy (7", Single) | Gira | MEM S/602 | Portugal | 1984 | |
| Challenger (12") | Nunk Records | NUNK 1 027 | Belgium | 1984 | |
| Challenger (12", Gat) | Memory Records | Memix 027 | Germany | 1984 | |
| Challenger (7") | Memory Records | MEMIX 0202 | Germany | 1984 | |
| Challenger (Swedish Remix) / Happy Birthday (To My Mammy) (12") | Beat Box (Sweden) | BB 8032 | Sweden | 1985 | |
| Challenger / Happy Birthday (To My Mammy) (12") | Blanco Y Negro (2) | MX 126 | Spain | 1985 | |
| Challenger (7") | Beat Box (Sweden) | BB 7032 | Sweden | 1985 | |
| Challenger (7") | Carrere, Clever | 13844 | France | 1985 | |
| Challenger (7", Single) | Nunk Records | N 127 | Belgium |
