

Officially, it was to preserve the Vault. After congratulating him on his achievements, he brutally cast him out. Īfter wandering the wasteland, the Vault Dweller finally returned on May 10, 2162. After another month and a half, on April 20, 2162, he killed the Lieutenant and destroyed the Mariposa Military Base along with the Forced Evolutionary Virus vats. Within a month, on March 3, 2162, the Vault Dweller destroyed the Master at the Cathedral, with extreme prejudice. The Overseer calculated, accurately, that the mutations were too uniform and the numbers grew too fast to allow for Vault 13 to remain safe and undiscovered. However, he was immediately sent back out to find the Master and destroy him and the production laboratory that was being used to create the super mutants. The Vault Dweller returned in February 2162, after salvaging the chip from the Necropolis Vault 12.

With an estimated 150 days worth of water reserves left, Jacoren sent out the Vault Dweller on December 5, 2161, 7:21 AM. When the water chip broke in December 2161, the situation became an emergency. He was lost to the wasteland after he was apprehended by super mutants at Necropolis and sent for dipping. Another was Talius, sent out with a shotgun. Ed was one of the first and perished not long after stepping outside the Vault door. Overseer Jacoren sent out the first explorers to find a spare. Vault 13's water chip began to fail some years before 2161. However, it was then used as a control group for Enclave experiments. After the water chip forced Jacoren to improvise, the experiment was largely invalidated. Within the Vault Experiment, the purpose of Vault 13 was to remain closed for 200 years, as a study of prolonged isolation. It was one of the last Vaults to begin construction in the west, with a cycle plagued by delays and problems. In case of water table contamination, the government approved Vault Water Purification System would handle decontamination and purification, rated to work without significant loss of output for 250,000 hours (~28 years). Located in a scenic mountainous region, Vault 13 was designed to provide its inhabitants with an endless supply of pure water from a nearby underground river.
