Access big gun control panel

Access big gun control panel is a mission in Up Your Arsenal, taking place in the Nefarious BFG, Koros. Following Clank's suggestion, Ratchet fought through Dr. Nefarious' forces to get inside the command center in order to use the large cannon that could destroy the Biobliterator. Once inside, the two fought a garrison defending the center in order to give Clank access to the cannon and use it to destroy the Biobliterator.