The MKS BulletML Pattern Builder is an editing tool used to create bullet patterns for Shoot ‘Em Up (a. k. a. Schmup) games that can parse and interpret BulletML XML files as per standard BulletML Specification. This editor supports both the horizontal and vertical bullet pattern development as used in horizontal (left to right axis) and vertical (down to up axis) scrolling shooters, for example.

This application enables the user to configure and preview bullet patterns within the editor before exporting the data out for further processing. Both the BulletML XML file and Pattern Builder project JSON files can be exported and used for subsequent parsing and processing in other games and tools.