The Seaside_v1.3.zip file you have requested: Maps Levels Missions / Multiplayer / 6 Player / Seaside v1.3 - 36kb is not available. Perhaps try browsing all files for the game C&C: Red Alert 3 and upload any files you want to share or are missing. This is the only information we could locate:
Seaside Version 1.3 is a 6 player map by Adanf. 2 mode game type: you can select infinite money or standard money.