Regret - Hunt the Hierarch - Adds ODSTs and increases ally squad size, diversifies Covenant weapon spawns

Regret - Hunt the Hierarch - Covenant Civil War Edition - Adds allied Elites, Grunts, Jackals, Honour Guards and Rangers to Regret. Swaps Jackal snipers in the ruins for 'Heretics'. The Prophet has been altered.

Regret - Hunt the Hierarch - Elite Edition - Adds allied Elites to the start of the mission, who will accompany the player to the end.

Adds Fireteam Blamite, a UNSC-friendly squad of Elites, Jackals, Grunts, Marines and ODSTs to the start of the level - allied health increased on higher difficulties