 Most artwork is stored in the portable network graphics format and all are licensed under the GNU General Public License.The musical style of the game's soundtrack is orchestral, with a symphony of strings, brass, winds, percussion, and occasionally ethnic instruments when the game allows for it, covering a variety of genre and periods.Because the themes are based on traditional and medieval styles, the music development department rejects all music with synths, loops, drum kits, electric guitars, or any pop/rock instruments.