The game consists of three separate campaigns plus a short training scenario: one for Masaki (easy difficulty), one for Ryune (medium difficulty) and one for a mysterious third character who was believed killed in the previous game (hard difficulty). Masaki's and Ryune's campaigns can be selected from the beginning, while the third one only unlocks upon completion of the earlier ones. All in all, the game includes more than 60 scenarios. While there are some branches in the mission tree, they are not as extensive as in the previous game. It is possible to import the results of one campaign into the beginning of another, leading to slightly different events.