What is MARVEL Cosmic Invasion: Siege of Castle Doom?

MARVEL Cosmic Invasion: The Siege of Castle Doom is out now. The DLC adds a new run-based Castle Doom mode, Doctor Doom and Invisible Woman as playable characters, new perks, permanent rewards, and more. Check out the details below

Developed by Tribute Games and published by Dotemu, the DLC expands the tag-team co-op beat ‘em up with more reasons to jump back into the fight against Annihilus.

The Siege of Castle Doom is available on Steam, Nintendo Switch 1 & 2, PlayStation 4 & 5, and Xbox Series X|S for $7.99, with a limited-time 10% launch discount through Nov. 17.

The MARVEL Cosmic Invasion: Year of Doom bundle is also available for $37.99 and includes the base game and both DLCs released this year.

What’s New in The Siege of Castle Doom?

No doubt the headline addition is Castle Doom, a replayable, run-based mode where players break through Victor von Doom’s stronghold and attempt to stop his latest creation, the Cosmic Inductor.

Runs feature branching pathways, new enemies, and 12 defensive, damage, and tactical perks. Doom’s traps can also apply debuffs when objectives are failed, bringing an interesting risk/reward element to each attempt.

Players can also earn permanent equipment, Reed’s Lab events, and gameplay modifiers that impact future runs.

Doctor Doom and Invisible Woman Join the Fight

Two fan-requested characters also join the roster.

Invisible Woman uses Susan Storm’s light-bending powers and force fields to bring a new fighting style, while Doctor Doom combines his high-powered armor, technology, and occult abilities.

The DLC also adds new color palettes for every playable Super Hero, earned by defeating Doctor Doom, while composer Tee Lopes returns with new music that dynamically adapts to the action.

Overall, The Siege of Castle Doom looks like a strong addition for existing players, with the replayable new mode and two very different characters giving us a good reason to jump back in.