Problem with opening xenoblade .rar file

Guys I'm new to all this so I'm going to list the issue I'm having in detail below - hopefully someone can help!!
I have dolphin. I'm trying to download xenoblade Chronicles for wii. Please help! Thanks,Once the file is downloaded in .rar file, I cannot extract it. I've tried several extraction programs: Stuffit, 7zX, and Zipeg.
Typical error is, "structure of archive is damaged" - What game you are trying to run? XChronicles
- What system the game is for? Wii
- What emulator are you trying to run? Dolphin
- What are your computer specs? (Operating System, Processor, RAM and Video Card).
iMac desktop with Yosemite version 10.10.5, 16GB 1600 MHz DDR3
Graphics NVIDIA GeForce GT 750M 1024 MB

You tried every archiver except WinRar which you need...Get it here:http://www.rarlab.com/download.htm

winrar updated the encryption on their program so you'll likely need to use winRAR itself to actually extract it.

Thank you so much! Got it. Looks beautiful in HD.

Replying to #4

except wii isn't HD.

Replying to #5

Dolphin upscales it. Some of the game already have the assets in that size and otherwise the upscaling algorithm is really damn good. So essentially it is full HD. :)