The Coalition is a paramilitary peacekeeping organization created to provide shelter for refugees from the apocalypse and reclaim zombie infested lands. Although it is currently unknown how many other bases they own, they have several members based in Russia on board the Liberator. They once had control over the Oil Rig and Coalition Base in Russia, and the Coalition stronghold in Berlin, Germany.
It is unknown who founded the Coalition, but the Coalition has worked directly with various governments in order to control the virus epidemic.
- Russia: Russia joined the Coalition after the outbreak of the virus grew into a full-scale epidemic. In Russia the Coalition was in control of an underground bunker east of Silo 22, and of the Russian Oil Rig. An AC-130 stationed in one of the hangars at Volk Military Base also seems to be owned by the Coalition. By the time the Liberator had arrived to the shore of Russia, the Oil Rig, Volk Military Base, and the Coalition bunker were all overrun by zombies.
- Germany: It is unknown when Germany did join the Coalition, but presence of the organization is much stronger in this region than in Russia. In Germany the Coalition had control over the Coalition stronghold in downtown Berlin, entrances to which were blocked off with heavy gates. Blockposts of the Coalition were placed around three major tunnels leading out of the country. The Stronghold was overrun by zombies as result of sabotage performed by the mysterious Syndicate, tunnel blockposts are believed to have been overrun soon after the central base of the Coalition in the Stronghold has fallen. Current status of the Coalition in Germany is unknown.
The Coalition has six ranks:
- Ensign — Soldier in a squad;
- Lieutenant — Deputy to a Major;
- Major — Leader of a squad;
- Commander — Right hand of a Captain;
- Captain — Leader of a contingent;
- Admiral — Heads of state strategizing The Coalition's global offensive.
In order to achieve its goals, the Coalition utilizes a number of vehicles.
- Jeep: Coalition variant Jeeps are found at Coalition locations in Germany.
- Ural: Coalition variant Urals are found at Coalition locations in Germany.
- Unidentified Truck: Two trucks in the Coalition's standard blue color can be found in Berlin, Germany. They are not acquirable as a functional Vehicle.
- AC-130: The Coalition utilizes AC-130 cargo planes to drop Carepackages across the Playable Maps.
- Fighter Jet: The Fighter Jet is used by the Coalition in Germany and Russia. In Russia, it can be acquired by The Player through completing the Top Gun quest aboard the Liberator.
- Aircraft Carrier: The Coalition in Russia possess an aircraft carrier known as the Liberator. It serves as the headquarters for the Coalition in the area. It was based near Germany before being off the coast of Russia
Even though the Coalition is capable of packaging weaponry from all over the world to send it to the survivors in the form of Carepackages, members of the Coalition are only personally equipped with a small variety of them.
- Avenger: The Avenger is found commonly at Coalition locations.
- Desert Falcon: The Desert Falcon is typically reserved for high-ranking members of the Coalition.
- Scalar: Coalition guards aboard the Liberator are issued the Scalar, which is an exclusively Coalition weapon.
- The Coalition appears to use Navy officer ranks with the exception of the rank Major, which is an infantry and air force rank.