Unreal Engine 4 Presented at GDC 2014

All tools, features and complete C++ source code available to the development community through a new subscription model
At the 2014 Game Developers Conference, Epic Games announced that developers can sign up for UE4 for PC, Mac, iOS and Android by paying $19 per month, plus 5% of gross revenue resulting from any commercial products built using UE4. In addition to the new subscription model, Unreal Engine 4 can be licensed via custom-negotiated terms, for companies that wish to form a closer support relationship with Epic, or to reduce or eliminate the 5% royalty in exchange for up-front payment.