The Invaders are the primary antagonists of Metal Slug 6. They appear as large, toad-like creatures, with bulbous heads and reptilian features. Their technology appears to be organic, as seen when certain vehicles leak a blood-like fluid when destroyed. Certain members of the species are gifted with insect-like wings, and the ability to launch corrosive plasma blasts from their mouths. Their society is hive-based, with rank based on skin color and durability. They are led by the massive Invader Queen, the final boss of Metal Slug 6. They may very well eclipse the Martians in viciousness.


  • Drones
  • Flying Drones
  • Troopers
  • Elite Troopers
  • Squad Leaders
  • Flying Parasite
  • Hunter Walker
  • Hunter Lord
  • Scavenger
  • Smasher
  • Invader Queen


  • UFO
  • Flying Core
  • Super UFO
  • Crab Tank
  • Vanguard
  • Controller