In addition to weapons scattered throughout the ship, players can access schematics to build powerful offensive and defensive weapons, including 4 variations of the Venom X from the previous chapter. Players can also find intel as well to learn more about the story of Extinction. The fourth map, "Awakening", which is released as part of the Invasion DLC pack, is advertised as the third episode. The map takes place in an underground Cryptid hive, 36 hours after "Mayday", and introduces three new types of Cryptids: the flying Gargoyle, the explosive Bomber, and the powerful Mammoth. The Cryptids' masters, the Ancestors, are also seen in the map. The players have access to ARK attachments, which turn weapons into laser weapons, greatly increasing their power. As with the previous two maps, intels can be found to discover more information regarding the story. The final map, "Exodus", which also acts as the final episode of Extinction, is released as part of the Nemesis DLC pack. The map takes place in a launch facility, 3 months after "Awakening", where the players are pit in a final battle against the forces of the Cryptids. Nearly every Cryptid type is encountered in the map, including the Ancestors. Players can choose their own paths in progressing throughout the map. The map also introduces two brand new weapons, the NX-1 Disruptor and the NX-1 Grenades, which are required in taking out the Ancestors. "Call of Duty: Ghosts" is set in the near future that follows the nuclear destruction of the Middle East. The oil-producing nations of South America form the "Federation of the Americas" in response to the ensuing global economic crisis and quickly grow into a global superpower, swiftly invading and conquering Central America, the Caribbean, and Mexico. The game's main protagonists are the Ghosts, a force of U.S. Special Operations personnel trained to conduct clandestine missions behind enemy lines. The unit is led by retired U.S. Army Captain Elias Walker (Stephen Lang). He is joined by his sons Logan and David "Hesh" Walker (Brandon Routh), along with a trained German Shepherd named Riley, Captain Thomas A. Merrick (Jeffrey Pierce), and Gunnery Sergeant Keegan P. Russ (Brian Bloom). The game's main antagonist is Gabriel Rorke (Kevin Gage), the former leader of the Ghosts who works for the Federation after being captured and brainwashed by the Federation via torture and hallucinogens. In 2017, U.S. Army officer Elias Walker tells his teenage sons Hesh and Logan the legend of how the Ghosts, an elite coalition of all U.S. Special Operations units, first appeared.