Ben 10 - Ultimate Alien - Cosmic Destruction ROM Download can be obtained free for Nintendo DS on EmuGames.net only. Play Alien emulator game in English for the USA region. Ben 10 Ultimate Alien Cosmic Destruction is a NDS ROM that you can download to your computer or play online within your browser. You can also download roms such as Ben 10 Omniverse and Ben 10 Alien Force that work on all devices including desktop and mobile. Be sure to rate the game if you enjoyed playing this ROM.