Ragnarök Online, often referred to as RO, is a Korean massive multiplayer online role-playing game or MMORPG created by GRAVITY Co. Ltd based on the manhwa Ragnarok by Lee Myung-jin. It was first released in South Korea on 31 August 2002 for Microsoft Windows and has since been released in many other locales around the world. Ragnarok Online is divided into a series of maps on two major continents, each of which has its own terrain and native monsters, though many monsters are present in multiple regions. Transportation between maps requires loading the new map and monsters are unable to travel from one map to another unless directly associated with the player such as a pet, mount, or hireling. There are three major nations in Ragnarok Online, the first of which and where all players start is the kingdom of Rune Midgard. The Schwaltzvalt Republic, an industrialized neighbor to the North, was added in Episode 10 and Arunafeltz, a religious nation is the subject of Episode 11. Within the many cities and towns, there are many activities that players can participate in. Usually, there will an Eden Teleport Officer and several Kafra Employees throughout the city. Eden Teleport Officers work for an organization called the Eden Group that allows players to sign up for quests and submit them for rewards. Kafra Employees help players by providing storage and teleport services for a small fee. These two NPCs are very important to the development of characters in the game. "Jobs" are one of the most important aspects of Ragnarok Online. A player choice of job will determine his or her strengths and weaknesses both in a party and outside of one. The job system initially consisted of 13 classes, which has increased to over 50 via several updates. Each class specializes in certain skills corresponding to archetypes in a role-playing game. Additionally, numerous equipment are exclusive to particular classes.The greatness of the equipment depends on the character attribute status.