Diablo III is 3 years old today, and with its anniversary, Blizzard has announced a special event that sees the addition of randomly appearing portals that lead to the infamous Cow Level. Here's what Blizzard posted:
Effective immediately, we encourage all residents of Sanctuary to steer clear of the wilds. From dawn on May 15 to dusk on May 21, it is also recommended that you avoid entering any strange portals that may or may not lead to alternate planes of existence. This activity cud be potentially hazardous to your health and, in the opinion of this humble civil servant, is a veally bad idea in general.
Players on the PC, PS4 and Xbox One who log into the game from May 15 to May 21 will encounter Treasure Goblins who spawn Cow Level portals. Players on the Xbox 360 and PS3 won't be able to access the new area, so they'll just get a crummy +100% EXP and Gold buff instead.
While it probably won't bring more players into the Diablo III, it's certainly a treat for anyone still playing the game and a nice throwback to the old cow level in Diablo II. Remember that one, and how it basically ruined the game? Yeah, good times.
You can watch a video of the cow level on this page by clicking on the helmet graphic above the navigation blocks.