BlazBlue: Calamity Trigger is a 2D fighting game with 12 characters, each with unique personalities, fighting styles and advantages. During the story mode every character has its own story which is told with dialogue between fights. During some of those dialogues the player has to choose between answers which influences the story's ending. Additionally there is a arcade mode (fighting against all characters in a row), score attack and a multiplayer mode.
The fighting system utilizes the usual fighting game options: there are weak, middle and strong attacks. Certain button combinations result in special, character specific attacks. If the player manages to hurt his opponent (or gets hit) a special energy bar fills up. If it is full he can unleash an especially powerful attack. There also is a stamina bar which decreases while blocking: when it is empty the character takes extra damage.