Marvel Cosmic Invasion: The Siege of Castle Doom DLC details revealed

Dotemu and Tribute Games have unveiled gameplay details for ‘The Siege of Castle Doom’, the second premium DLC for the cooperative tag-team beat ‘em up, MARVEL Cosmic Invasion. Scheduled for release on November 10, 2026, the expansion introduces a new roguelite-style game mode set within Victor von Doom’s fortress.

In the ‘Castle Doom’ mode, players must navigate winding routes and overcome traps and Doom Bots to prevent the activation of the Cosmic Inductor, a device capable of destroying the cosmos. Players will utilize a Stabilizer, created by Reed Richards, to stall Doom’s progress. The gameplay features a ‘Siege Gauge’ that increases the strength of castle defenses as time passes; if the gauge fills completely before the final confrontation, the attempt ends.

Strategic elements include collecting Battery Cells and completing challenges to earn one of 12 different perks categorized into defense, offense, and tactics. Successful runs allow players to permanently unlock new equipment and events from Reed’s Lab. The DLC will also add Doctor Doom and The Invisible Woman as playable characters. The expansion will be available on PC, Nintendo Switch, Nintendo Switch 2, PlayStation 4, PlayStation 5, and Xbox Series X|S.