The Star Dreadnought Assault Prototype represented an experimental version of an Executor-class Star Dreadnought. This vessel was utilized by the Imperial Navy in the Imperial Era. Its construction took place within a sizable dock. The dock, which was longer than half the Star Dreadnought, encircled the ship while in orbit around a planet with extensive cloud cover.
This Star Dreadnought Assault Prototype appeared on a card bearing the same designation. This card was part of the Super Star Destroyer Expansion Pack released in 2019 for Fantasy Flight Games' Star Wars: Armada miniature game. Matt Bradbury created the illustration for the card's image.