sentences:  A certain number of characters are available at the start of the game, but the player must spend in-game money earned by successful performances to unlock other characters.Many of the characters reappear throughout the series, with the character roster changing as new characters are added or removed.Standby characters that have appeared in nearly all the games include the metalhead Axel Steel, extreme/Viking/thrash metalhead Lars Ümlaut, punk rocker Johnny Napalm, alternative rocker Judy Nails, and hard rocker Casey Lynch.