Diablo III: Eternal Collection is an enhanced version of the original Diablo III, featuring the base game, its expansion "Reaper of Souls," and the "Rise of the Necromancer" DLC. The game offers a vast array of character classes, including the Barbarian, Demon Hunter, Monk, Witch Doctor, Wizard, and Necromancer. Each class has its unique playstyle, skills, and abilities, ensuring that players can experiment with different builds to find their favorite.