The Hollow quest in Survive Overnight in a Mega Store is built around a single cauldron. You find out what it needs, survive the day with food and weapons, and then spend the night opening chests for the missing ingredients while staying clear of the guards.
Quick answer: Start the Hollow event from a platform, check the cauldron’s three required items, collect them from chests at night while avoiding guards, then fill and stir the cauldron to get the badge.
How to complete the Hollow quest
The cauldron needs each item in its required quantity. A partly filled cauldron won’t complete the quest, so keep searching chests until every requirement is met.
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The reward for the Hollow quest is a badge. The game awards it once every required item is in the cauldron in the right quantity. If the badge shows up after you fill and stir the cauldron, the quest is complete.






