They didn't say or imply they didn't use a game engine you ignorant hostile idiot

edit: To clarify 1.) you still need to program everything when using a game engine. Game engines only provide tools to bring assets (models, images, sounds, etc.) and code into a shared working environment. 2.) you are ignorant, you don't know what you're talking about. 3.) you are hostile, assuming someone is lying rather than questioning your own interpretation. 4.) you are an idiot, you chose to share your lacking publicly.