Roast: Medium House Breakfast Blend Plus Robusta for Extra Caffeine This is an extra caffeine blend that will give you the energy you need for that late-night gaming grind! But what's the lore behind Berserker? Glad you asked! Berserker (meaning Bear-shirt) in Old-Norse were those who were said to have fought in a trance-like fury. They would wear the skins of bears, wolfs, or even boars to harness the animal's strength. Berserker, or "Zerker", is also a known characteristic or trait in many games for a DPS/Tank class. If you want to do some damage, this blend is for you.