to improve the field maps, add a competitive hunting system and a mission ranking system. SUN Korea adopted F2P mode and item mall model on November 14, 2006. NHN USA Corp., the publisher of SUN in North America which made a license agreement with Webzen on May 21, 2009. S.U.N. was available for distribution and operation in North America through the gaming corporation ijji. A beta test of Webzen's version was held from October 14, 2009 until October 16, 2009. Webzen's S.U.N. version came out October 21, 2009. Battle Zone System Under the Battle Zone System, players could create "rooms" for battles, be it against monsters or other players. Players had to talk with a specific non-player character (NPC) in each town to create such rooms. They could select different types of maps, areas, set the entry numbers, degree of difficulty and types of monsters within the map. For a players vs. monsters map, players formed a party and usually had to proceed through the map to complete certain map objectives, such as killing the boss monster. At the end of the stage, experience and loot were shared among the participants. Character classes Like in Webzen's earlier MMORPG, MU Online, players had a selection of five different character classes: Dragon Knight, Berserker, Valkyrie, Elementalist and Shadow. For each class height, hairstyle, and face could be picked from several alternatives, but each class had a predefined gender. However, since Episode 2's release, each class was available to another character. For example, a Dragon Knight could be a Valkyrie, and an Elementalist had the possibility of being a Shadow; all of this is in terms of skill set and play-style. Soundtrack The soundtrack for this MMORPG was composed by Howard Shore. References External links S.U.N. Official Korean website S.U.N. Official America/Europe website S.U.N. Official Taiwan website S.U.N. Official Russia website S.U.N. Official S.E. Asia website S.U.N. Official Japan website 2006 video games Massively multiplayer online role-playing games 2007 video games Fantasy massively multiplayer online role-playing games Ijji Inactive massively multiplayer online games Products and services discontinued in 2013 Video games developed in South Korea Windows games Windows-only games Webzen games The9 games