Kameo

Kameo: Elements of Power is a 2005 action-adventure video game developed by Rare and published by Microsoft Game Studios. The player controls Kameo, a 16-year-old elf princess, who must travel across a fantasy land and its realms, rescuing her family while collecting Elemental Sprites and Warriors in a beat 'em up style combat system, in order to defeat the troll king Thorn and her treacherous sister Kalus. Kameo's ten elemental powers let her transform into creatures and use their varied abilities to solve combat-oriented puzzles and progress through the game's levels.