RuneScape is a fantasy MMORPG developed and published by Jagex, released originally in January 2001. RuneScape can be used as a graphical browser game, implemented on the client-side in Java, and... wikipedia.org
Definition #2 for "runescape"
RuneScape is a massively multiplayer online role-playing game (MMORPG ) released by Jagex Games Studios in 2001. In the game, players adventure across the world of Gielinor, where they complete quests, combat enemies and train a variety of skills.