Hydra / Affinity (Backbeat Remix)

Whose song is Hydra / Affinity (Backbeat Remix)?

Artist Album
Cosmic Gate
Back 2 Back In The Mix (CD2)
Back2Back CD 2
dj GT
Neverending Melodies 2003
Various
Cosmic Gate - Back 2 Back (In The Mix) (Cd 2)
Various Artists
KREMLIN - 2 Days of Kaos