LUA - Lua Source File is a very distinct source code that is written in a way for all users to understand. If you are looking for a format that can extend your applications you should keep this one in mind. It is designed for language programming. You can also use this type of file to make particular applications customized to your preference. There are many video games that use this format, and you can as well when you begin playing them. However, you must be aware that they are not saved in plain text. This is yet another format that is beneficial for playing online games. You must make sure that it is installed on your system if you want to enjoy your game playing.