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|"This ultimate weapon was brought by Morden's Armies from the future."|
The Kraken is a playable unit in Metal Slug Attack, first appearing in the Extra Ops "Black Future". Parts could be obtained by participating in the event. As this Extra Ops has ended, its parts are currently available through Another Story, through the Alien's second chapter "For You".
The Kraken also appears as the boss on Attack! on Friday (or Thursday in lagging zones).
It is an expensive, but extremely durable air unit, especially with 4, which boosts its health greatly. The Kraken's most notable feature is its special attack, where it drops lava projectiles on top of enemies. All types of enemies will be hit by these projectiles, and they are also capable of damaging the enemy base. After performing its special attack, it flies back to the player base, much like The Keesi III. Like Augensterm Ver(P.M) or Crazy Ralf, any attack that would cause it to be knocked back is instead countered.
The Amadeus Hi-Do can be considered a cheaper version of the Kraken.
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- The Kraken is currently the only Extra Ops boss that requires an item from another Extra Ops boss for full completion (in this case, it is the Pharaoh Box from the Mummy's Extra Ops).