The Borg are a force unamtched in the Galaxy. The race is comprised of 'Drones', all of whome belonged to different species but were assimilated into the Borg Collective after their ship or planet were attacked. The Borg's ultimate goal is to achieve perfection by assimilating the knowledge and skills of other cultures. A feature of Borg Drones making them extra formidable are their adaptable shielding, allowing them to become invulnerable to enemy weaponry.

The Etherians are a mysterious race who base their ship and weaponry on stasis technology. The Etherians trapped within The Forge live aboard a 'sleeper ship' in stasis, and were originally travelling to a new star system in order to start a new colony. Although initial first contact with the Etherians led to conflict, they have become allies with Voyager within The Forge.

The Klingon Empire is a galactic power in the Beta Quadrant with a society based on honor and glory, and holds some of the finest warriors known. A Klingon Bird of Prey has become trapped within The Forge and it's crew have banded together in a loose alliance with three other species who scavenge new ships to the region for supplies in order to survive.

Not known for combat skills, the Malon are from the Delta Quadrant with a small area of space and are well known for dumping harmful toxic waste in space. A Malon ship has become trapped within The Forge and it's crew have banded together in a loose alliance with three other species who scavenge new ships to the region for supplies in order to survive.

A warrior species whose culture has become to hunt out prey whether they are enemy individuals or starships, the Hirogen are found all over the Delta Quadrant. A Hirogen vessel has become trapped within The Forge and it's crew have banded together in a loose alliance with three other species who scavenge new ships to the region for supplies in order to survive.

Actually Humans from a mirror universe first encountered by the original Starship Enterprise, the Terran Empire is a violent mirror to the Federation. A Constitution-class vessel has become trapped within The Forge and it's crew have banded together in a loose alliance with three other species who scavenge new ships to the region for supplies in order to survive.

The origin of the Harvesters is not yet known. When a new ship enters the Forge, Harvesters are dispatched to attack the ship and disassemble pieces from it. After contact, a Harvester raiding party takes pieces of the ship and members of the crew to bring back to the Forge.

These mechanical robots are the 'crew' of the Dreadnought Gunship found by Voyager within The Forge. They service and protect the ship, and many different models of robots exist from Warrior Bots to flying Scout Bots to suit all the needs that may arise aboard the gunship.

Architects of The Forge and designed by a long dead civilization, the Vorsoth trap tactically worthy ships within a dampening field and send out Harvesters to collect crew and valuable technology from trapped ships from which it can create a master race of warriors to take on and expand throughout the known universe.