Solasta: Crown of the Magister

This will unlock after you create 20 potions. To create a potion you will need a recipe, which you can pick up in loot as you're adventuring, or buying from the various vendors around. All recipes you read are for the whole party, not for a particular person so don't stress too much about who is reading the recipe.

Finally you need the components to make the potion. These you will find in chests, in loot from mobs, and from random events when travelling.

You can make multiple copies of the same potion for the achievement.