House ordered the Securitrons to emerge from the Lucky 38, offering an ultimatum to the raider tribes settled on the Strip: join House and be part of his New Vegas, leave the Strip, or die. A society that would no doubt see Las Vegas and its power source, the dam, as theirs for the taking.

These were no tribals, these were civilized people – somewhere, out in the wastes, a new society had begun. In 2274, New California Republic scouts arrived at Hoover Dam, piquing House's interest. In 2138, House awoke from his coma, but only observed - did not interfere - as the city was settled by tribals, raiders, and at least one overweight gangster similar to Junktown's Gizmo was known to have made his mark on pre-new Las Vegas. While many citizens were spared and even began celebrating, fallout from the warheads that did hit blew into the city, killing all of them. Although most of Vegas was saved, he suffered numerous system crashes and was eventually forced into a coma. House was forced to make do with his relatively primitive systems, but still managed to stop 68 of the 77 ICBMs aimed at the Vegas area. The attack, however, came 20 hours earlier than House had predicted, and before the platinum chip could leave Sunnyvale, the city was reduced to rubble, with the chip buried beneath it. The platinum chip was due for delivery by courier on October 23, 2077, the day of the Great War. Meanwhile, House oversees the growing tumultuous situation in the region from atop his sky-reaching tower, visible from nearly all locations across the Vegas Valley. He has fitted his home, the Lucky 38 Casino, with radar-jamming systems, missile arrays, a laser defense network, and life-support systems which only marks the beginning of his grand plans to revitalize the city and beyond. Since the war, House has since created even more Securitrons, some to police the Strip, with an army of them hidden beneath Fortification Hill. To this end, he had engineers in Sunnyvale develop the platinum chip, a sophisticated, high-density data storage device that would upgrade his defense systems and Securitrons to the Mark II OS, ensuring that Vegas and the surrounding area would be as safe as possible. House calculated that his defenses would see off the majority of missiles bound for Vegas, but at least some damage to outer Vegas and the surrounding towns was unavoidable. He used his considerable intelligence and vast wealth to ensure that when the war finally came, he would be prepared. In 2065, House correctly predicted that a nuclear exchange between the United States and China would take place within the next 15 years, and began dedicating his resources to the protection of his home city. Unlike other major cities of the United States, Vegas emerged from the atomic fire of the Great War relatively unscathed, owed to the preemptive actions of Robert House.

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