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I unzipped the file but it still won't let me play it. It shows up as a .rar file. Is there a program I need to download to play it?

no you did not unzip the file. you need to download winrar, a file compression program.

from here:

install that, then unzip the file.

i guess i could just use winzip, since it's implemented in windows by default, but then the download size will be an extra 100mb

7-Zip ???