Diablo III turns three years old today, and Blizzard is hosting an event to celebrate. PC, Xbox One, and PS4 players will be able to embark upon extra portal quests, which will grant you extra loot. It'll run until May 21. Unfortunately, Xbox 360 and PS3 owners won't be able to join in since they don't have an up-to-date version of the game, so they'll get double experience and gold instead.
The game has come a long way since launch, with a number of notable improvements like Loot 2.0 and the removal of the Auction House.