A Trademark is never wrong. If you want to make Profit from your games, you have to Pay taxes as every Company does. Here you can be punished real hard for Acting and earning money like a Company, without paying the taxes.
Also saving the Domain and choosing a rare Name will help. If you search for Beaverlicious, you find me and nearly just me. If you choose redflag for example, youll be on page 10000;-)