<P> Armor can be bought from an armor vendor on certain planets . Each upgrade to the armor decreases the amount of damage the player takes from enemy weapons . Each armor upgrade costs a large amount of bolts . </P> <P> On planet Kerwan, Ratchet and Clank are working on a hovercraft . Clank receives a distress call from Captain Qwark . After fighting through an army of heavily armed commandos, they are confronted by Emperor Percival Tachyon, self - proclaimed "crown prince of the Cragmites", who demands Ratchet offer his life to save the city . At the last second, the duo slip past him and escape on his private cruiser . After experiencing a deep hyper sleep, they wake up to find themselves on planet Cobalia in the Polaris galaxy . Learning that Tachyon has already conquered many neighboring planets, they decide to learn more about him . In the course of their investigation, Clank is visited by small creatures called the Zoni that only he can see . The Zoni explain that Clank was built for a special purpose, and provide him with new abilities to aid Ratchet . The duo eventually discover a remote space station in an asteroid field, where they meet Talwyn Apogee and her allies Cronk and Zephyr . Talwyn explains that her father, explorer Max Apogee, was the galaxy's leading expert on Lombax technology and thus may hold the secret to their disappearance . </P> <P> With their help, Ratchet learns of the Great War, a conflict between the Lombaxes and the Cragmite Empire that ended with the complete eradication of the latter; however, he also learns that the Cragmites were not killed but instead banished to a distant star, using a powerful Lombax device known as the "Dimensionator", a helmet capable of opening wormholes to other dimensions . Years later, a single Cragmite egg was recovered on the Lombax home world, Fastoon . Rather than destroy it, they decided to raise it as one of their own . However, when the young Tachyon learned of his true origins, he raised an army and attacked Fastoon . Unable to defeat him, the survivors used the Dimensionator to escape, leaving behind its guardian and his young son to hide it from Tachyon . Sacrificing himself to protect his son, the guardian sent him to the planet Veldin in the Solana galaxy . Ratchet realizes that the guardian was his father and becomes determined to find the Dimensionator so that he can save his people . </P> <P> Using clues left by Max Apogee, Ratchet locates the Dimensionator on planet Jasindu, defeating the Kerchu tribe sworn to protect it . The device is swiped by space pirates led by Captain Romulus Slag, but the duo pursues them and reclaims it . Captain Qwark, having escaped Tachyon's custody, then takes the Dimensionator to the Cragmite home planet, where he plans to destroy it . Before Ratchet and his friends can catch up to him, he is recaptured by Tachyon's forces . With the Dimensionator now in his possession, Tachyon frees the Cragmites and sets out to conquer the rest of the galaxy . After a fierce battle on Fastoon, Tachyon offers Ratchet the chance to rejoin his fellow Lombaxes, but Ratchet refuses and challenges him to personal combat . The Dimensionator is damaged during the battle, opening a black hole that swallows Tachyon, and while Ratchet and Clank are able to fix it with a 3 ​ ⁄ cubits hexagonal washer they received from the Plumber, the device shuts down for good as soon as they return . </P>

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