Now you can download and play around in the Unreal 4 engine without even paying the $19 a month for updates! Apparently, Epic was getting squeezed out development-wise by the free Unity engine, so they changed their tune just today. Read all about it (and download it if you are interested) here:
https://www.unrealengine.com/blog
Don't forget the 5% royalty if you end up selling something made with it. Still, it is a great deal.