Wolfranium

Hello everyone, I need to know if there's a way to batch edit the metadata existent. For example: selecting all my game music (Mario, Zelda, Doom, etc. ), and editing the metadata artist to "game" and all musics will be together under the same artist named "game" As far as i know, i can only edit one by one, and that's a lot of work.... =/ Sorry for my english, it's not my native language. Thank you in advance. =]