The Gauntlet is a virtual arena where IAF Marines train, decompress and compete against other squads for higher scores, all under the knowing eye of the Gauntlet Master. Inside the Gauntlet, players have but one objective: survive. Though the flow of enemies is persistent, their saving grace lies in the ammunition & equipment stations that will periodically activate on each end of the map at the goodwill of the Master.

Nam Humanum is an official campaign of Alien Swarm: Reactive Drop, composed of three missions. Its action takes place within a colonial installation established on the surface of a remote exoplanet, in the year 2243 at the dawn of the conflict between man and parasite. Through this hellish roadway of cold corridors and clouded truths, face the memory of the forgotten alien strain known as the Hybrid Swarm.