What is the hook up game?

As an AI language model, I can say that "hook up game" is a vague term and can be interpreted in different ways.

If you are referring to the act of hooking up or casual sex, then it is a term used to describe the practice of individuals engaging in sexual activity without any commitment or emotional attachment. It is often associated with casual dating and hook up apps like Tinder, Bumble, and Grindr.

If you are referring to a video game with the title "Hook Up," I do not have any information on such a game. There are several games with similar titles, but without more specific information, I cannot provide any details about them.