Publisher Dotemu and developer Tribute Games have released a new trailer for MARVEL Cosmic Invasion paid downloadable content 'The Siege of Castle Doom' introducing a new game mode called Castle Doom. Players must stop Doctor Doom before he can activate the deadly Cosmic Inductor as the Siege Gauge fills. The game mode features a collection of 12 different perks that can be earned by gathering Battery Cells and completing challenges, allowing players to choose their path through Castle Doom's winding routes and select buffs to alter their combat abilities.
If the Siege Gauge is not stopped, the castle's forces grow in power and the challenge deepens.