The de_descent.zip file you have requested: Maps Levels Missions / "Compound 57" Map for CS - 5.67mb is not available. Perhaps try browsing all files for the game Counter-Strike: Condition Zero and upload any files you want to share or are missing. This is the only information we could locate:
This map is designed for intense and quick gameplay, with locations and possibilities for vertical battles. This is a de_descent-based map, set in "Compound 57." A converted map from the Anticitizen modification.