The Yeast They Can Do is an achievement that requires the player to exchange 5 ecto-tokens for brewing yeast with Metarialus in the The Green Ghost inn's cellar while having an empty pot in the inventory.

A ghostspeak amulet or cramulet must be worn to talk to Metarialus.

Keep the yeast, there is another medium achievement, The Beer Inn-spectre, that needs it.


  • This achievement used to be a task prior to the release of the Achievements System on 18 April 2017.
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