RuneScape

RuneScape is a fantasy massively multiplayer online role-playing game (MMORPG). RuneScape takes place in the world of Gielinor, a medieval fantasy realm divided into different kingdoms, regions, and cities. Players can travel throughout Gielinor via a number of methods including on foot, magical spells, or charter ships. Each region offers different types of monsters, resources, and quests to challenge players.

Players are represented in the game with customisable avatars. RuneScape does not follow a linear storyline; rather, players set their own goals and objectives. Players can choose to fight non-player character (NPC) monsters, complete quests, or increase their experience in the available skills. Players interact with each other through trading, chatting, or by participating in mini-games and activities, some of which are competitive or combative in nature, while others require cooperative or collaborative play.

You can find more details here