So,i've searched a bit in here,saw a S2 engine which takes a fee only if u make over 100000$ UDK is also free untill u make over 50000$? Unity looks like 100000$ too Now,all of them state that it reffers to commercial entity. So,in order to get the licence for using any of those engines publicly,u have to start a company?…
Unity does not charge royalties ever. http://unity3d.com/unity/faq Just use that. I really don't know where you are getting your info from on unity, do you have a link? Edit: In my understanding if you make over $100,000 you would need to upgrade to unity pro. Even then you still do not pay royalties. So Unity Pro would be…