To find the Tasty Donut Safe Key needed to open the Tasty Donut Store Safe in Dead Island 2, travel to the northern side of Venice Beach.
Once there, you’ll find the Tasty Donut Boss.
Take him out the loot the Tasty Donut Safe Key. Now that you have the key, make your way over to the Tasty Donut.
Loot the Tasty Donut Store Safe to find the Liquidator Shotgun!