Can you make Three-Dimensional games in Blender? I know how to make models and objects within Blender, and I was wondering if it is possible to make games using the models I have made? Is this possible within Blender or do I need to use Third-Party software? Also, If I must use a Third-Party software, which would be the best to use?
Blender itself has a built-in game engine, meaning yes it is not only possible but rather easy to do.
Right here is an excellent tutorial series explaining in detail the process of creating an operating and clean game using Blender Game Engine.
Welcome to Blender SE :)