The Action Time (AT) Battle (アクション (AT) バトル,Akushon Taimu Bator?) is the traditional battle infrastructure of the Trails games. It is where all active combatants take action per turn in order. The order starts with the character at the top of the bar, and continues following below the bar. However, each action taken can cause delay depending on which battle command taken, affecting the time for their next turn.
On the left side of screen is the AT Bar, which shows the turn order of your party and enemies. There are also AT Bonuses' attached the the AT Bar, like HP recovery and critical hit effects, giving either both your party and opponents the advantage.
The first few games had simple battle systems that developed as the series grew. The newer games have more intricate battle systems that involve attention from the player in real-time. They generally make up a large part of the game and allow the party to advance in strength and abilities, gain new items, while gaining the upper hand in the storyline.