U.F.G.E is the greatest fighting game engine on the market. It utilizes Unreal Engine’s brand-new utility widget system which makes creating fighting games easier than ever before. Not only is it easy-to-use, it’s also extensive and contains many aspects you would expect a AAA fighting game to have. A system like U.F.G.E would take months to years for a solo developer to create and would cost big companies $100,000+ to develop.
With Ultimate Fighting Game Engine you can harvest the power of UE4. Here's a list of fighting games created with the engine: