The Borg Class 4 tactical vessel was a type of heavily-armed Borg cube utilized by the Borg Collective. The tactical cube differed from the standard Borg cube in several ways, the most notable being the extensive hull armor that covered a large portion of the exterior hull of the ship. The interior was also slightly altered from what is known of Borg "architecture". The vessel's central plexus was protected by multi-regenerative security fields. This ship is part of the 5th wave of expansion packs for the Star Trek: Attack Wing game.