worldofwarcraft.blizzard.com
This role-playing game, the fourth in the WarCraft series, was released in 2004. The World of Warcraft, set in Azeroth, has received seven major expansions and has become the most popular and subscribed to.
In this game, you can control a character in either the first or third person and explore the realm, interact with other characters, perform missions, and battle various monsters from the cosmos.
You can choose between multiple servers or realms, the latter of which contains a player versus environment mode where you can perform missions and fight AI-controlled creatures. You can also compete against another player, battle monsters and other player characters, and roleplay various scenarios.