In the Star Trekfictional universe, the Borg tactical cube ship is a starship used by the Borg. It is a variant upon the standard Borg cube with the additions of large, solid pieces of armor attached to the exterior. Presumably it possesses more power, weaponry, and deflector shielding. It was first seen in Star Trek Voyager episode "Unimatrix Zero, Part 1".
In the PCgameStar Trek: Armada II, eight tactical cubes could be joined into a single starship, the tactical fusion cube. Note that this is highly noncanon.
