Gaming's Top 10 Easter Eggs

IGN's has kicked up a new holiday-inspired "Gaming's Top 10 Easter Eggs" feature, in which Diablo II's cow level and World of Warcraft's usage of pop culture references receive mentions.
Waaaaay back when, back during the original Diablo era of the mid-90s, a rumour began that there was a hidden 'cows' level buried deep in the game a stage that only the most click-happy fans could unlock. It was, sadly, a lie. However, Blizzard does love its fans so lo and behold the sequel, Diablo II, does in fact contain a secret Cows stage. This one was triggered by collecting a specific item before beating the game and then entering a portal to the alternate hell-cow dimension, where wave after wave of angry cattle would come at you from all directions.