Blizzard's latest Diablo 4 endgame preview makes the MMO comparisons even easier to make.
Diablo 4 begins as an action RPG where you click your way through dungeons collecting rare loot. But once you hit level 50 and finish the story, you'll have a list of MMO-like activities to complete as you climb through the remaining 50 levels. It's not unlike previous Diablo games, but the open world and repeatable quest systems push it closer to an MMO experience.
