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The Siege of Castle Doom has begun

The Siege of Castle Doom has begun

Dateline: 11/10/2026

MARVEL Cosmic Invasion: The Siege of Castle Doom debuted today.

From Dotemu:

In MARVEL Cosmic Invasion, the immortal Super Villain Annihilus has launched an unprecedented attack across the galaxy, threatening all life as we know it. Fighters, both Earth-born and cosmic, must now join forces in a star-spanning adventure against the deadly Annihilation Wave. Choose from a playable roster of 19 Super Heroes, tagging between duos mid-fight with the innovative Cosmic Swap system to mix and match abilities while fighting to foil Annihilus’ grand plan: spreading death across the cosmos with the help of Thanos, M.O.D.O.K, Taskmaster and his most devious allies.

MARVEL Cosmic Invasion: The Siege of Castle Doom is available as premium DLC on Steam, Nintendo Switch 1 & 2, PlayStation 4 & 5, and Xbox Series X|S for $7.99, with limited time 10% launch discounts available through Nov. 17*. For those who haven’t joined the fight against Annihilus yet, a MARVEL Cosmic Invasion: Year of Doom bundle featuring the base game and the two DLCs released this year is also available, priced at $37.99.

MARVEL Cosmic Invasion: The Siege of Castle Doom Features

  • The All-new Castle Doom Game Mode:
  • Highly Replayable, Run-based Action: Break through the defenses of Victor von Doom’s foreboding stronghold in a bold, exciting fight to foil his ill-advised invention to thwart Annihilus, the Cosmic Inductor. Branching pathways, new enemies, and a risk/reward-filled battle against time that’s wholly unique from MARVEL Cosmic Invasion’s original adventure await.
  • Ability-altering Fun: Gain defense, damage or tactical upgrades from a collection of 12 different perks – but use caution around the traps Doctor Doom has set for your arrival, as a failed objective can weaken your fighters through debuffs…
  • Unlockable Rewards: Earn permanent new equipment unlocks and events from Reed’s Lab, as well as gameplay impacting modifiers that deepen the challenge for future runs.
  • Two New Fan-requested Playable Characters:
  • The Invisible Woman: Cosmic rays have given archeologist and explorer Susan Storm massive light-bending powers and force field manipulation. She now fights for the survival of the galaxy as The Invisible Woman, bringing in never-seen-before abilities to MARVEL Cosmic Invasion.
  • Doctor Doom: Equipped with high-powered tech armor of his own design, along with occult skills and his genius intellect, Doctor Doom is the biggest threat in the universe... and Annihilus definitely won't be up to the challenge.
  • New Color Palette Options: Add fresh color variants for all playable Super Heroes by delivering Doctor Doom’s defeat at their hand.
  • Electrifying Original Music: MARVEL Cosmic Invasion soundtrack composer Tee Lopes returns for an out-of-this-world encore with additional new musical tracks that adapt to the gameplay.

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