Before the War
At the time of the Great War, ODYSSEUS was an order of magnitude more powerful than contemporary ZAX units. It was designed to coordinate and operate all of the Vaults before the Federal Vault projects were privatized. Poseidon sold the A.I. to the government for use in the maintenance and coordination of Tibbets’ Prison, which housed war criminals/deserters who had been exposed to biological weapons or radiation in Denver, Phoenix or Las Vegas. Even though it was retrofitted for maintaining the prison and monitoring the prisoners, it still retained an inordinate amount of security clearance. Other than prisoners, no humans were present at Tibbets. ODYSSEUS commanded the all-robot staff, including the seldom-roused ARGOS, who served as the tireless defender of the prison. The government wanted ODYSSEUS to be able to “advise” on the spread of plague vectors in the case of a prison break. This included warming up launch sites like B.O.M.B.-001.
When ODYSSEUS was sold to the prison, its creator became so frustrated that he left Poseidon and started a new project – Diana. ODYSSEUS was the mightiest of all mighty computers. ZAX super computer units were nothing compared to ODYSSEUS, and even though Diana was made by ODYSSEUS’ creator, she was developed to be emotionally sophisticated, not powerful.
After the War
Presper and his followers released the New Plague virus in the remote areas near Boulder and Denver. It was close enough to the quarantine prison to spur ODYSSEUS into action, but not near enough to huge populations to start a general panic. ODYSSEUS tracked all of the prisoners, so the spread of all the prisoners would alert ODYSSEUS to the various plague vectors. ODYSSEUS was far too secure for Presper to hack, so the only way he could get ODYSSEUS to send the launch codes to BOMB was to lead ODYSSEUS to a logical conclusion: the plague vectors (prisoners) had infected too much of an area for the plague to be conventionally contained. In order to do it, Presper’s men staged an attack on the prison which would allow everyone to escape. This event would start a countdown of sorts for missile launch on B.O.M.B.-001. ODYSSEUS would assess the viral spread, try to gather up all the escaped prisoners, and once most of the prisoners had been retrieved, launch nuclear missiles to “clean & prevent” any further infection.
After all of the untraceable prisoners were returned it did some massive calculations of where everyone had traveled and it showed that the Prisoner (and the other prisoners) had spread the Limit-115 to a variety of places. At that point, ODYSSEUS made the determination that the plague was spreading too far, so it armed the B.O.M.B. satellites and melted itself down to try killing all of the prisoners.