The player can control one of two characters: Kei and Reina. The game can be played in either first person, third person, or fixed camera angle views. Kei's levels are more action based, while Reina's are more adventure-based.

There is also a unique multiplayer cooperative mode where one player controls Kei and the other Reina. This mode is different from the single-player mode, as it is much shorter and objectives, monsters, and events are all altered.