Set just before the infamous Mansion Incident of the first game, Resident Evil Zero follows S.T.A.R.S. rookie Rebecca Chambers as she investigates a series of gruesome murders in the Arklay Mountains. After the Ecliptic Express train comes to a screeching halt, she forms an unlikely alliance with death-row convict Billy Coen. The HD Remaster enhances this experience with:

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Rebecca's classic S.T.A.R.S. 1996 and her original prototype outfit.

What is the 5/10 DLC which is what I see in the fitgirl repack?

The 2016 remaster offers significant improvements:

Leo tried to close the game. Alt+F4 did nothing. Task Manager showed a process named with no CPU usage but infinite memory.