For other uses, see Heretic (disambiguation).
Heretic, like Midship, is set inside the Covenant CCS-class battlecruiser Pious Inquisitor shortly after the Fall of High Charity, part of the Fleet of Retribution. Outside the map, several CAS-class assault carriers and CCS-class battlecruisers part of the fleet can be seen flying towards a gas giant and another planet. A distant star illuminates the planets and a massive orange nebula surrounds the sun.
Heretic is a remake of the Halo 2 multiplayer map Midship, and as such was built off the original Halo 2 map geometry to maintain accuracy with the original map. The map has been visually updated for the specifications of the Xbox 360, with some minor alterations such as locked doors on the level's exterior that better ground the map in the universe.
It is located on one of the blue ledges beside the sword platform. If you enter Monitor Mode while on the sword platform, and fly up and look to the right, the skull should be disturbingly staring at you.
On Heretic, there are two achievements available to get, the first being the hidden Skull which will award you 25 Gamerscore, and the second being Blades of Fury, the requirements of which being to get a Sword Spree on Heretic (ranked or social), and will also award you 25 gamerscore.