From Halopedia, the Halo wiki
Acheron Security once developed Tactical Autonomous Robotic Defense System, an early effort by the corporation to create autonomous combat drones. The project was later deemed irrelevant with the advent of augmentations in human soldiers.
Following the Covenant war, as part of the Damascus Ordnance Commission, Acheron Security was contacted to produce and refine second generation MJOLNIR suits. As well, the corporation assisted in the construction of the Nova Austin Station on Cascade.
The company had facilities in the following cities and locations:
List of appearances