The overall story involves the player discovering he is a carrier of a nasty virus that if it does not kill you, it makes you sterile. After “escaping” the prison because of a strange assault by what looks like NCR soldiers, the player immediately has the freedom to go where they want. During the course of his adventures, the player discovers that in order to get the prison robots to cease their pursuit, the player must hunt down and retrieve several escaped prisoners and return them to their cell, where the prison computer checks off the prisoners from its list. The player later discovers that returning the prisoners conveys to the computer where the prisoners went to and how far the virus has been spread throughout the wasteland. Once enough prisoners have been tallied, the computer unlocks an orbiting nuclear missile station and begins a countdown to “cleansing” the land. As it turns out, this is the situation the main bad guy wants, because he wants to “cleanse” the earth’s surface (at least the American portion) so he can start the human race anew. The player is then tasked with finding a way to the orbiting station to stop the bad guy – or help him, if he so chooses. I’m sure I forgot quite a few things.