I'm going to upload my Android mobile game on Google Play. But it seems like all games are developed by companies(such as Zynga, and King) and I don't see individual's names as developers. Do I need to register a company name officially? I think it costs a few hundred dollars... If I have to, how and where do I register? or instead of registering a company for a few hundred dollars, if I make a domain website that is named as my company name, would it provide me some protections? Also, do I need to trademark my game's title as well? Thanks!
You can put what you want under developer name. Just make sure its not a trademark being used or registered trademark. Or just use your real name. It doesn't matter too much.
If you make up a name and brand yourself as it, its a trademark. A website would help prove you used it first.