Castle Doom is highly fortified with extreme measures such as Doom-Knights, Warrior Robots, human Latverian Guardsmen, Guardian Robots for detection and protection. Also included in Doom's stronghold are stunners, shock fields, gas emitters, and possibly Rainbow Missiles or Vortex Machines.
in this world Doom used his castle to protect the worlds humans
Marvel Ultimate Alliance
While trying to find NightCrawler, the team of superheroes find themselves at Castle Doom. It is the final level in the game.