Heavy Assault Ships, often simply called Siege Capital Ships, sacrifice mobility and survivability for very powerful offensive capabilities. The Heavy Assault Ship is also the only capital ship that specializes in planetary bombardment. The Advent Revelation Battlecruiser is a little odd, and aside from its high bombard damage its more similar to a Support Capital Ship. Otherwise the Marza Dreadnought and Vulkoras Desolator are highly comparable to Battleships.
- Damage: Capital Ship (25% damage to Fighters; 75% damage to Scout Frigates, Colonization Frigates, Long Range Frigates, and Bombers; and full damage to all other ships)
- Main article: Marza Dreadnought
- Main article: Revelation Battlecruiser
- Main article: Vulkoras Desolator