hey, im totally new to this site and i know this is probably a stupid question, but once you download all the files for a game...how do you play it?
thx
Then once that's all installed, attempt to extract the Heretic files using WinRAR.
Obviously since you're using Windows XP (It's very predictable to know EVERY NEWBIE uses this p-OS) you're gonna need a newer engine for it. Zdoom works great with Heretic.