Karate is not from China, Korea or any country other than Japan. There are many groups who claim to teach Karate, but are actually teaching something else entirely. There are also those who teach an amalgam of systems, often based on traditional Karate, and refer to them as Karate. I find the former disingenuous, while the latter is a respectful nod to their origins.
Karate is not a game. There is a serious sporting element, but Karate cannot be played at.