The megaport_one.zip file you have requested: Maps Levels Missions / Multiplayer / 8 Player / MegaPort One - 240.88kb is not available. Perhaps try browsing all files for the game C&C3: Tiberium Wars and upload any files you want to share or are missing. This is the only information we could locate:
MegaPort One============This is an 8 player free-for-all map for Command and Conquer 3. There is no tiberium at the start locations, instead you'll have 2 tiberium spikes and 2 silos. Then you have to fight over the blue tiberium fields a MegaPort One is a large GDI port that has been built in open water. Nod has mounted an attack on the port in order to cripple the GDI supply lines.