I'll put it like this. Rar files, my Dell HP laptop can't run or extract the contents from without a paid program or first converting the file to zip. 'Zip files' are literally compressed folders. The same Dell HP laptop can easily extract files from a folder with the built-in File Explorer 'app'. I agree with travisz's point however, as more people would be able to access you game faster, easier, cheaper, and safer(I've run into too many false converter websites) if you give them multiple options.