Ratchet, Clank, Qwark and Nefarious were held captive inside the vault after being captured by the Creature Collector. After being mistaken as minions, they had to pass a "Gadget Ceritifcation" test in order to escape being probed. However, the Steward eventually noticed their trespassing and they were taken by Commander Spog to be killed. Eventually, the true purpose of the vault was revealed. It was to house creatures for Loki souls to inhabit, in order to conquer the galaxy in numbers.