Referred to by surprised ISA forces as advanced battlecruisers or battleships, the Arc Cruiser was an advanced offshoot of the standard Cruiser production line. An extension of the Helghast military's program to weaponize Petrusite, the new warship lead the counter attack in the wake of the nuclear detonation of Pyrrhus. Additions to the new warship included a long range warp jump generator as shown in many illustrations, as well as four underbelly mounted petrusite beam cannons for long range ship combat (a deficiency of the original cruisers) and air-to-ground bombardment.