Complex sentence: The album is their third to be released on Alfa Matrix records, of which the first single "Ok" (including the remix by "M.I.K.E.") and the track "SOS Overdose" already attracted a lot of attention before the album was actually released.
Split into simpler sentences: The album is their third to be released on Alfa Matrix records. The first single "Ok" (including the remix by "M.I.K.E.") and the track "SOS Overdose" attracted a great deal of attention before the album was actually released.