hi i just tried downloading sonic adventure DX director's cut for the gamecube and it said that it finished downloading but it wouldn't unRAR. it was supposed to be about 1.2 gb but only 750 mb downloaded. and my internet connection is fine. has this happened to anyone else?
That means you have problem when downloading. Try redownloading it using a Download Manager like Free Download Manager or Flashget, you can redownload the same game for the next 24 hours after you download it for free.
You can download for no point cost within 24 hours, and can always resume for free. Another reason why download managers are good, resuming even 40 hours later won't cost you any points.