JumpStart 5th Grade is set up as a series of missions (similar to JumpStart Adventures 3rd Grade: Mystery Mountain and JumpStart Adventures 4th Grade: Haunted Island) however, unlike the aforementioned games, it has a relatively small amount of missions (only 6). X is not seen or heard from again, leaving it unknown as to when he will strike next. In the game's epilogue, Jo Hammet becomes famous for her valiant efforts, and Dr. After freeing Martin and his uncle, Jo makes her escape as the bomb detonates, and the water is diverted away from the city just in time. X reveals himself and claims that he is victorious, unaware of Jo's interception of his plan. Jo Hammet then travels to the dam, and pulls a lever that controls a gate which will divert the water away from the city. X kidnapped Martin and his uncle, and blew up the pumping station, raising the water pressure substantially so that blowing up the dam would result in a huge flood of water that could destroy the entire city. The game's conclusion takes place at the Boulder Canyon Dam. This begins a series of missions to find out which site in Hooverville is presently being targeted, what items will be needed to get to the bomb, and finally defusing the bomb at the site. X is currently targeting, and how to safely get to the bomb. The henchmen have special octopi on their heads that allow to communicate telepathically, and by deciphering the meaning in their telepathic conversations, Jo will be able to figure out which site in Hooverville Dr. Martin instructs Jo to use his glasses to read the minds of Dr. X, a scientist who became malicious after an experiment gone wrong and now seeks to destroy factories and power plants to get revenge on them for cutting his research funding. After Jo meets up with Martin, he explains that he is being held hostage by Dr. After decoding the message hidden in the crossword puzzle on the note, Jo discovers Martin's location. Skinny suddenly shows up at the museum, and gives Jo a note from Martin. She and her class go on a field trip to the local art museum, and while there, the museum janitor's nephew, Martin, bumps into Jo Hammet, drops his glasses, and suddenly gets taken away by some thugs.Īfter Martin's kidnapping, a talking rat named B. She boards the school bus with her skateboard that she keeps with her at all times.

X blew up the television station, although no one was hurt. After Jo wakes up from a horrible nightmare, she finds out that her television isn't working.

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