The de_rockin.rar file you have requested: Maps Levels Missions / DE Maps / Q to R Titles / CS: Source De Rockin Map - 1.42mb is not available. Perhaps try browsing all files for the game Counter-Strike: Source and upload any files you want to share or are missing. This is the only information we could locate:
It's based on fy_iceworld. It's a completely new map! Now you have one bomb target.