TARTARUS Battleship
The TARTARUS is the super-scale battleship the player pilots in DREADNOUGHT TARTARUS. It appears suddenly in Earth's orbit at the start of the game, and its size rivals that of a moving city. Its firepower is explicitly described as capable of erasing entire metropolitan areas.
A Configurable War Machine
The TARTARUS is not a fixed unit. benkimchi has described it as a constantly evolving war machine where every major system can be configured and modified. That is the loadout backbone of the game: fight, gain intel, reverse-engineer new systems, reconfigure, fight again.
Hangar Bay
The TARTARUS carries a combat mech in its hangar bay. The player can drop into the combat mech to handle smaller-scale confrontations at ground level and return to the battleship when the bigger picture needs attention.