From offshoots of primitive RPGs for the Apple II like Fallout, to games that haven't even come out yet like No More Heroes 2 (pictured above, the spiritual successor to Killer 7 and expected in January 2010), sometimes the best sequels are the ones that borrow only certain elements, of varying degrees, from their predecessors. Here is a countdown of 13 of the most successful video game spiritual successors.
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