The Moscow Metro was used as a shelter during World War 3. Out of the original 200,000 survivors, less than 50,000 people are left. The main factions are the Fourth Reich, Hansa, Polis, Rangers, Stalkers, Bandits, Revolutionaries, VDNKh Commonwealth, 1905 Confederation, Baumansky Alliance, Armory, and Belorusskaya Trade Outpost. There are also mutants, anomalies, and ghosts in the Metro. Many stations are abandoned, but others are inhabited. Military Grade Rounds are used as currency.