As the game progresses, stronger enemy ships (labeled according to letters from the NATO phonetic alphabet) arrive.
Captain | captain | Captain America | Captain (United States) | Captain (land) | Captain (association football) | Batman Forever | Captain Kangaroo | Captain Hook | Captain Cook | Captain (British Army and Royal Marines) | Captain Beefheart | Captain (land and air) | Forever Evil | Forever 21 | Captain (naval) | Captain America: The First Avenger | Captain N: The Game Master | Captain (nautical) | Group Captain | Captain (U.S. Army) | Captain (OF-2) | Captain (cricket) | Captain Scarlet and the Mysterons | Captain Haddock | Strawberry Fields Forever | On a Clear Day You Can See Forever | Captain (Royal Navy) | Captain Nemo | Captain (sports) |