Harman Smith and Kun Lan are from Killer7, a game that less than 1 million people have played, so it is far from a lock to be in the contest. I can't really go into too much detail with their rivalry though because that would be full of spoilers
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"Anybody interested in grabbing a couple of burgers and hittin' the cemetery?" -Royal
"Oh sure, walk to the sun"- Guybrush