Fallout: Lonestar is an upcoming post apocalyptic role-playing dlc-sized new lands mod developed by Terrorweed Games for Fallout 4. The mod was previously developed for New Vegas, however because of Fallout 4's recent release, the team sought to re-develop it for that game. Lonestar, like several other new lands mods, seek to serve as unofficial additions to the Fallout series storyline.


In Fallout: Lonestar, the history of the Fallout universe is developed in a number of ways, both in the Old World and the New World.

The Gusher Age

In 1920, petroleum reserves of unprecedented size were discovered in Texas, the largest fields under west Texas. Rapid industrial development and regional growth followed. Texas quickly became one of the leading oil-producing states in the US, along with Oklahoma and California. At the beginning of the 20th century, Texas was mostly rural with no major cities. By the end of World War II, Texas would become heavily industrialized, with multiple cities among the twenty most populated in the United States. Oil baron Gabriel Wortham Chamberlain secured the rights to the “El Dorado” oil fields of West Texas and founded Chamberlain Petroleum. By 1957, Chamberlain was one of the eight richest people in the world. Oil returns from the El Dorado region began to wane in 1994, prompting then CEO Gabrielle Marie Chamberlain to sell the region, along with the rest of Chamberlain Petroleum, to Poseidon Oil. In 2030, Poseidon Oil technicians in the oil fields of west Texas officially reported zero extractions in the El Dorado region.

Occupation of Mexico

By 2050, the United States had lept vast distances in various technologies, but it remained severely energy inefficient. Oil reserves were depleted at an astonishing rate, forcing the U.S. to consider alternative means for securing petroleum. The United States was Mexico’s largest customer in terms of petroleum, however, criminal cartels had abandoned the drug market to steal Mexican oil. Shipments destined for U.S. checkpoints were often hijacked by the Toros, a powerful paramilitary cartel that controlled the majority of Mexico’s criminal trade. The cartel also engaged in “pipeline milking” wherein they tapped existing oil pipelines or, after terrorizing refineries, drove their own tankers up to facilities and helped themselves. This brought the available oil supply down to its lowest point in 80 years. In 2051, in response to the cartel interference with oil production, the United States brought military aid into Mexico. Officially, the Mexican government requested the aid of American forces in the form of the Army Corps of Engineers. The reality of the situation was more embarrassing for Mexican authorities, as the United States had a hand in destabilizing Mexico and now they were asking America for help. Forward operating bases were established in key locations to secure refineries and create a protected means of shipment back to the United States.

Operation Black River

In December, 2050, private military forces, supervised by the US Armed Forces, established Forward Operating Base Hercules in Ciudad Juarez. The name was inspired by the seventh labor of Hercules, wherein Hercules strangled the Cretan Bull with his bare hands. Soldiers often referred to the operation as “taking the bull by the horns.” By 2052, Operation Black River occupied twelve refineries and maintained five forward operating bases in northern Mexico. Each refinery was originally owned by Petro-Chico’s parent company, Itzamna Petroleos Mexicanos (IPM). Securing the refineries while combatting the cartels proved difficult. The Mexican government provided little aid to the operation, as much of the Mexican army was either against the American occupation or in the pocket of the cartel.

The New Plague

The time from onset of early, flu-like symptoms to death was three to five days. Later, infected subjects suffered from profuse sweating, unexplained contusions/swelling, and massive external hemorrhaging. Eventually, the New Plague resulted in clogged respiration, usually killing the infected subject. Survivors of the New Plague usually ended up sterile. The government used the Plague as an excuse to register civilians, claiming a symptom of the plague was “socialist thoughts” and advocating isolation: people should stay indoors, read books and avoid “Ice cream socials”. The epidemic killed approximately two-hundred thousand citizens in the United States, forcing the United States to close its borders and declare the first-ever national quarantine.

Building the Great Wall

James Haggerty III, CEO of Texas Mechanics & Implementation (TMI), had been an advocate of strict immigration policy. Without much success, the engineering magnate had proposed an initiative to build a protective barrier between the southern commonwealths and Mexico.

“The purpose of this second and more glorious Great Wall is to protect the nation from undesirables, smugglers, and the nefarious communist who might use Mexico as a gateway through which to peddle his destructive ideology.” – Wimbrow Commission Debriefing, James Haggerty III

Applying construction techniques developed by TMI and implemented by Vault-tec, Haggerty’s proposal detailed a swift, efficient, and cost effective construction schedule that would begin in El Paso and simultaneously build east and west until it reached the Pacific Ocean and the Gulf of Mexico. Known as the “Great Wall”, its construction was nearly complete as of second quarter 2077.


Pre-release concept art

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