| Cassius 99 (Remix / Radio Edit) | 3:30 | |
| Cassius 99 (Remix / Long Version) | 9:05 | |
| Cassius 1999 (Album Version) | 3:43 |
| Title, Format | Label | Cat# | Country | Year | |
|---|---|---|---|---|---|
| Cassius 1999 (CD, Maxi) | Virgin, Virgin France S.A. | 7243 8 95582 2 7, DINSD 177 | France | 1999 | |
| 99 (Cassius Remix) / 99 (DJ Tool) (12", Promo) | Virgin France S.A. | VISA 8285 | France | 1998 | |
| Cassius 1999 (12") | Virgin, Virgin France S.A. | DINST 177, 7243 8 95582 6 5 | France | 1998 | |
| Cassius 1999 (CD, Maxi, Promo) | Astralwerks | ASW CD PRO 9901-2 | US | 1998 | |
| Cassius 99 (CD, Single, Promo, Car) | Virgin France S.A. | VISA 4486 | France | 1998 | |
| Cassius 1999 (12") | Virgin, Virgin France S.A. | DINST 177, 7243 5 47641 6 5 | UK | 1999 | |
| Cassius 1999 (12", Promo) | Virgin France S.A. | VISA 8309 | France | 1999 | |
| Cassius 1999 (7", Promo) | Virgin | DINSLH 177 | UK | 1999 | |
| Cassius 1999 (CD, Maxi) | Virgin, Virgin France S.A. | 7243 8 95582 2 7, DINSD177 | Australasia | 1999 | |
| Cassius 1999 (CD, Single) | Virgin | 7243 8 95583 2 6 | Europe | 1999 |
referencing Cassius 1999, 12", DINST 177, 7243 5 47641 6 5