Role-playing video games (RPGs) form a loosely defined genre of computer and video games with origins in pen-and-paper role-playing games such as Dungeons & Dragons, borrowing much of their terminology, settings and game mechanics. The player in RPGs controls one or several adventuring party members fulfilling one or many quests. The major similarities with pen-and-paper games involve developed story-telling and narrative elements, player character development, complexity, as well as replayability and immersion. Electronic medium removes the necessity for a gamemaster and increases combat resolution speed. RPGs have evolved from simple text-based console-window games into visually rich 3D experiences.