To spawn the portal to the secret cow level, you need to first defeat Baal on your chosen difficulty. How To Unlock The Secret Cow Level | Portal Spawn Guide

As long as Diablo-like games exist, there will be Secret Cow Levels. Recently, Minecraft Dungeons included its own Secret Mooshroom Level. Even recent games are paying tribute to the Secret Cow Level. The Diablo 2 Secret Cow Level is one of the foundational secret levels in video games - its so magical, Blizzard tried to recapture the magic in Diablo 3 with the hidden Whimsyshire level. And you can experience it all in beautiful remade graphical glory in Diablo 2: Resurrected. Cutting through the armies of the angry cows leads to the Cow King boss fight. By opening a mysterious portal, adventurers can explore a ruined Tristram full of diabolical Hell Bovines armed with massive swords. If you’ve never experienced this infamous secret, the Secret Cow Level is exactly what it sounds like. Despite worries from the Diablo 2: Resurrected beta that the Secret Cow Level had been cut, we can all breathe easy - the Secret Cow Level is in the full game, and accessing it isn’t that difficult.

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