10 Video Game Bosses Only Hardcore Players Got To Fight

This list wouldn't be complete without the Cow King from Diablo II. This boss is the result of fan rumours about a secret area in the original Diablo, so only fans of the series would be aware of the possible inclusion of the Cow King.

The boss can only be found on the Secret Cow Level (also known as Moo Moo Farm, because of course it is), which can only be accessed by combining a Tome of Town Portal and a Wirt's Leg, which can only be obtained during the Search for Cain quest, in the Horadric Cube. Doing this will create a portal in the Act I starting area, allowing the player to enter the bovine realm.

However, the player can only create this portal when playing at a difficulty level they have already completed. So you must have already completed the game on that difficulty to be able to access it, but if you try to replay again on a different difficulty on which you haven't completed the game, the portal won't appear and you'll have wasted your time...