My First Bullet Cancel
Canceled an enemy bullet. (Arrange mode only)
Normally, you will unlock this achievement as soon as you begin the Arrange mode, so nothing to worry about. The following description is for players who want to know what's actually happening.
In Arrange mode, you can cancel enemy shots in certain pattern. The enemies will shoot bullets colored in red or blue. Your character's normal shot will cancel bullets with one of these colors. And your character's rapier will cancel bullets with another color. Utilizing these bullet cancel is a basic tactic in Arrange mode.
Modes able to unlock this (confirmed): Arrange
Modes unable to unlock this (supposed): all other modes
* Changing setting in OPTION -> Game Config disables all achievements.
* Using Restart from pause menu disables all achievements in that play.