EverQuest is a fantasy-themed massively multiplayer online role-playing game. The game's basic concept is reminiscent of earlier MUD (multi-user dungeon) games, replacing text-based gameplay with a graphical interface. In the beginning of the game, players create their avatars. Character races range from traditional elves to creatures unique to the game's world, such as the dragon-people Drakkin. Afterwards, the player assigns a class to the avatar, choosing between several categories which include various types of warriors, spellcasters, and clerics. It is also possible to customize the avatar's physical appearance. The player then ventures into the medieval fantasy world of Norrath. The basic gameplay is similar to that of most other RPGs: the player character fights monsters, accumulating money and experience points, and completes quests given by non-player characters. Trading with other player characters occupies an important place in the game; characters' trading skills can also be improved. Social interaction between players is often essential to build a balanced, efficient party of characters in order to tackle dungeons and bosses as a group. Players can interact with each other and discuss strategies, as well as join in-game player guilds. The game mainly focuses on cooperative gameplay; dueling is confined to restricted PvP (player-versus-player) areas.