This article contains unmarked spoilers for Book 5.
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The Double-Billed Achievement is an achievement awarded to Carl for participating in the drama Vengeance of the Daughter during The Hunting Grounds while on Dungeon Crawler World as part of a deal he made on the third floor with the producers.
AI Description
You are one of the first five crawlers to receive double-billing! I bet you don't know what that means. This is similar to switch-overs, but this time it's on purpose. I bet that didn't help at all.
Reward: You have received a Platinum Fan Box!