Well, you don't really need anything per say. Just double click the application to play it. However, if you tried launching the game through the folder you downloaded it in without unzipping it, you won't be able to play the game since it's a .rar folder. If you didn't unzip it, you'll need an unzipping program like winrar in order to access the folder's contents. The reason it's zipped is basicly a way for me to compress and upload the game onto this site with minimal space being taken, so I'm sorry if it's a minor annoyance, haha. But if you did already unzip the folder, then you'll just need to double click the application to play.