Random, world-wide occurrences—like a dragon attacking a town—that require players to spontaneously group up.
The ability to change your role (e.g., from a Warrior to a Mage) on a single character without restarting the game.
Massively Multiplayer Online (MMO) games are defined by their ability to support thousands of players simultaneously in a . While specific mechanics vary by genre, a "complete" feature set for a modern MMO typically includes the following pillars: 1. The Living World
Extensive visual options to ensure your avatar is unique.
A "gear grind" where you continuously hunt for more powerful equipment to tackle harder content. 3. Social & Group Systems
The world continues to exist and evolve even when you are offline.