This DLC idea takes place back during reach, including new weapons from that time and new enemies. You play as a sanghelli Zealot who is tasked with hunting spartans on reach.
This DLC gives a “you are the bad guy” story line, which introduces a few new things to infinite. The main one being playable elites as in the main story you are a Zealot. Allied grunts, jackals, and skirmishers follow you into each mission.
This would be built on the infinites gameplay with “FOBs” having phantoms which can drop in allies, weapons, and light vehicles as you move through its medium length campaign and small open world.
New UNSC units would be introduced to fill out the enemies for this DLC, these same troopers would be added to the main campaign in places that they fit, new weapons would be added as well, and new banished ranks for both this and the main campaign.
Base story
You are Rig-Remmemee a Sanghelli zealot serving the profits whims, after a spartan 3 killed your brothers in arms you have been tasked with hunting them down. (its noble 6). doing so requires chasing the spartans through hostile areas and seeing sides of the battle never seen before.
Lead covenant troops in epic ground battles, take hunters up against hogs, fight scorpion tanks with a wraith. and more as you fight through the city. end the life of new human enemies and fight for the glory of the profits.
Will you have the strength to make it through and take out the spartan in an epic final fight with the best soldiers in your ranks?
Story starts with Kats death and ends with you killing noble 6, has a different path as you push with covenant forces always a step behind until the end.
new enemies/allies
In the campaign you see new marine enemies, these are allies in the main game but are introduced in this DLC with them appearing in places they fit in the main game.
UNSC soldiers
Cyclops soldier
info: the UNSC equivalent to a hunter pair. these soldiers are in heave industrial mechs, armed with a 20mm cannon, shoulder mounted micro missiles (Orian shoulder angels.) and some of the strongest melee out there. they are easier to kill the hunters as their armor is easily stripped, but they come in groups of 3-5 on average.
Hellbringers
info: these soldiers bring fear to insurectionists and covenant alike, armed with a high in flamethrower they work to melt enemies, their fire being extremely good against shields. though they are explosive targets.
BANISHED RANKS
note: main campaign only
Firebringer
info: a brute with an old UNSC flamethrower, these guys are highly agressive and close range fighters, they also tend to have carbines for longer range fights.
NEW WEAPONS
Just go through the reach weapons, and add the shotgun, SMG, DMR, Needle rifle, grenade launcher, pulse rifle, and pulse repeater.
In the main campaign, these would be extremely rare, except the grenade launcher which UNSC marines will use a lot, I mean they already have the 40mm grenades from the things.