: Different factions have unique unlocks. For example, some players have reported difficulty unlocking the "Marines" option in certain revisions, so check the mod's Steam Discussion for specific troubleshooting. Quarantine Area [4.0.0] - Rusted Warfare - Steam Community : Includes a Campaign mode with specific mission
: Players can choose to lead survivors like the Los Angeles Civilians , government forces like the UN , or high-tech groups like Umbrella Corp . Alternatively, you can play as the Biological Institution (the infected) to spread the plague.
: When playing solo, set the AI to "Biological Institution" to face the zombie horde.