- Extract all three files to [TSEHD Steam folder]/Content/SeriousSamHD_TSE/<br />

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- Overwrite everything if you're upgrading from the previous version.<br />

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- Extract the 1.1.6 patch to somewhere then put everything from there into the NEW_ForgottenCity.gro, overwriting. You can use gro files with any kind of archiving tool that can do zip. With Total Commander, you can just open them if you hit enter on them, and have some kind of WinZip installed. Or WinRar.