Slua-unreal is an unreal4 plugin, which allows you to use Lua language to develop game logic and hot fix your code. It gives you 3 ways to wrap your C++ interface to Lua, including reflection by blueprint, C++ template, and static code generation. It also enables two-way communication between Blueprint and Lua. The advantage of Lua over C++ is that it requires no compilation for logic change, which significantly speeds up the game development process.