Deep Winter is the earliest game in the main timeline taking place in 2039 and is located in North-West Georgia, by the Half-moon lake. It is in its own timeline where the events of Sandstorm and Rain are still canon, but Deep Six is not.
The year is 2039, 7 years after the nuclear exchange, or "Flash" between the ACMF and NATO occurred. Soot blotted out the Sun. There is no food. Everything is cold. Everything is hostile. For all intents and purposes, this is a separate universe from the main story. The only reason this is so, is because Southside can't exist in both. In this universe, Southside is just a rural town in Georgia. Fort Shad is just an average military fort. The Den is just a post-war settlement. This alternate timeline still contains everything that happens in ATF1-3 & 5
There are many locations in Deep Winter and a guide does not exist, so most lore is unverified.
Southside was once a rural town in pre-war America that is now falling into ruins. No faction owns the town but most patrol regularly through it. Very few, if any, citizens remain in the town and anyone that does reside there is most likely a bandit. The town itself is mostly filled with ferals and various other mutants occupying sections of the town or the buildings. Also where you find the most frpers.
The Sewers Edit
The Sewers originally were made to maintain waste and sewage. After the Flash, the land above was filled with radiation and toxic air and because it did not affect locations underground, many citizens flocked to the sewers creating the settlement known as the Den. The sewers are occupied by mutants and there are rumors circulating of ACMF troops moving through them. The Sewers are considered a safe haven by many and it is one of the only places with a non-polluted atmosphere in the entire map, meaning that anyone can use The Sewers as a base when preparing to visit the surface. The residents of the sewer are in a constant fight for dominance against mutants, bandits and even ACMF troopers. The USCPF is rarely seen down here.
The Den Edit
The Den, located in the sewers, is a large scale post-war settlement that holds most of the civilian population in the area, The air in the Den is breathable like the sewers and is largely secure. The Den has a lot of space and plenty of pre-war food and medical supplies as well as a generator that supplies power to the various floodlights found around the Den. The Den also seems to be a marketplace and a "hotel" for travellers who don't live there. It also has a greenhouse where it can grow its own food. Many of the factions avoid this location due to the large population. The Den frequently sends out patrols through the tunnels and has several guard posts around their territory in order to protect it from mutants, bandits and other hostiles.
Fort Shad Edit
The US Fort was a pre-war location that belonged to the United States Military. It was abandoned afterwards, and now the fort is occupied by no one but the occasional feral or traveler. It holds several pieces of rusted artillery as well as various destroyed buildings such as the mess hall. It has been stripped clean of any small arms or useful items.
The ship was left drifting until it beached near the bridge, it still has several functioning systems and is largely intact, but a serious repair would be needed to restore it to basic functionality as a sea worthy vessel.
Powerplant GA-84 Edit
This power plant was abandoned in fairly good condition until the USCPF took it over and made serious repairs to it. It provides power to major points in the area. It is guarded 24/7 by the USCPF at all costs. It is the main base of the USCPF in the game. The USCPF even succeeded in making the air breathable there.
The Bridge Edit
This is the main link at the mouth of the river until the end of the war. It used to let people over and the occasional ship through until the Flash. Now it stands in up position as it was abandoned in a hurry soon after The Flash. It stands as an ominous reminder of the sudden event known as The Flash. There is an island in the middle. Sand bags and turrets have been set up near and atop a bus that covers most of the bridge. Inside the bus are some crates with supplies in them. While no faction is said to own this place, the turrets, supplies and sandbags suggest that this could, canonically, be a USCPF checkpoint or outpost.
ACMF Tank Camp Edit
This is a group of tanks that used to be part of an advancing ACMF force. It became a camp and shelter after the tanks ran out of fuel.
The Underground Railroad Edit
Not much information is present about this buried mall except that it is heavily guarded and is a hotspot for activity. When the entrance collapsed, the only reason anyone could still get in and out directly at its location was because a large truck pulling a container was stuck in the middle. The container broke on both sides and a rope was rolled down for easy access.
Downed Bomber Edit
This bomber was most likely once a supersonic B-1 Bomber that would have served for the US Air Force. Why it crashed is uncertain but it is thought it crashed either because of a pressure difference causing a breach in the hull, hence the large hole towards the front of it, or maybe shot down by a missile. It lies in a field where it sits rusting away, with a bomb load that could level the surrounding area completely if detonated. It still has a lot of weapons and supplies capable of giving a traveler the first smile in a while. It sits with its left wing broken and its right wing angled high into the air.
Abandoned Pre-War Prison Edit
This facility sits by Southside as a beacon of defense against the monsters created by the Flash. It was once a prison but soon after the Flash, most of its convicts escaped, killing their guards in the process. Its entrance gates still function somehow. Part of its prison barracks are destroyed but otherwise its buildings are all intact.
Cerberus Research Facility Edit
Not much is known about this mysterious facility to the general public due to the denial of its existence by USCPF forces. However, the facility, was once home to a SEAL research team that studied the effects regarding the infamous RAD virus. Until a catastrophic disaster occurred. Now the once advanced facility is consumed by organized mutants, as it contains one of their many spawning pools. Needless to say, any soul who goes through those rusty doors, Never comes out the same.
DECorp Office Building Edit
This building is filled with the old offices of the mercenary company DECorp. Remnants live here and you must have high level clearance to get in. The clearance is granted only to DECorp personnel (as said in the DECorp lore).
Drastead is just a small town, with CDF guarding it. From time to time the ACMF are seen in Drastead helping to guard the town with the small militia based in Drastead. Sometimes SEALs come into Drastead, and drop off supplies from the Den.
There are very little factions in Deep Winter, with mostly being remnants of what is left of the remaining forces left from pre-Flash.
The early version of USCPF is formed, whose goals are still to try to bring an end to mutants and restore America. The USCPF often occupy the abandoned military base due to most of the forces in the state likely were stationed there. They are also seen at The Bridge (normally manning the machine gun turrets or crouching behind sandbags atop the bus) and their main base, the GA-84 Powerplant. Their equipment is composed of what they had before the Flash.
The earliest form of the CDF, currently the militia protecting the Den. Their goal is to protect the Den and its citizens from the dangers of the frozen wastes. They are usually found patrolling the Den, and occasionally scavenging on the surface.
The North Atlantic Treaty Organization is a pre-Flash military alliance that combatted the ACMF during a six year war . After the Flash, some remnants remain in the United States. NATO's main goal in Deep Winter is to survive. With the ACMF still around, they may patrol and aid the USCPF.
The Asian Continental Military Force is a pre-flash military force that combatted NATO. After the Flash, ACMF was abandoned in the America, where their now divided goal is to survive. They usually avoid most locations with a large population due to the influx of people who hated them pre-flash and post-flash, Because of this they usually occupy destroyed area's such as the US Fort and sometimes host patrols in the town.
The Synthetically Engineered Assault League is a prototype-phase faction with unknown pre-war origins, due to the small amount of lore being written for them. It is unknown if they were affiliated with the United States Military pre-war because USCPF and SEAL sharing helmet textures are likely unintentional.
There are three existing morphs, the troops, the scouts, and the carriers.