Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is part of the Western United States and the Mountain States.
Colorado is bordered by the northwest state of Wyoming to the north, the midwest states of Nebraska and Kansas to the northeast and east, on the south by New Mexico and a small portion of the southern state of Oklahoma, and on the west by Utah. The four states of Colorado, New Mexico, Arizona, and Utah meet at one common point known as the Four Corners, which is known as the heart of the American Southwest. Colorado is one of only three U.S. states with no natural borders, the others being neighboring Wyoming and Utah.
Colorado is noted for its vivid landscape of mountains, forests, high plains, mesas, canyons, plateaus, rivers, and desert lands. The 2010 United States Census tallied the state population at 5,029,196 as of April 1, 2010, an increase of 16.92% since the 2000 United States Census. Denver is the capital and the most populous city of Colorado.
In 2009, during the outbreak of the Krippin Virus, ADX Florence was evacuated, except for John, who warden Halloran ordered be left behind at the prison to die. However, while those evacuated from ADX Florence were travelling via bus through the deserts, a horde of Darkseekers attacked the buses, apparently killing all the evacuated staff and prisoners. John spent three days locked in his cell, alone with no food or water.
Eventually, the Darkseekers were able to overrun and take over Colorado; and thus Fort Lee declared Colorado a hostile territory, and the state's entire power grid was shut down.
When this happened, all of ADX Florence's electronic locks deactivated, freeing John. After drinking from the prison's water supply and treating a head injury he suffered in his cell, and stocking up on ammunition, John fled ADX Florence in a stolen SUV, and drove off into the sunset.
In the night, while driving through the desert, John came across the wrecks of prison buses from ADX Florence, as well as the warden, Halloran's mangled corpse. When John exited the SUV to investigate, a Darkseeker jumped down from one of the wrecks at him, prompting him to shoot and kill it.
John then saw that the wrecks were infested with Darkseekers, and fled in the SUV back to ADX Florence, pursued by the Darkseeker mob. The Darkseekers cornered John in the prison, where the latter, armed with a shotgun, engaged the creatures in a last stand.