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Guides Pinpoint Tadpole Pens Key in Subnautica 2’s Hot Caves

The solution sends players to Zip’s blackbox in lava caverns that demand the Heat Tolerance adaptation.

Overview

  • New walkthroughs published Thursday and Friday confirm the Tadpole Pens door uses an off-site key recovered in the Hot Caves.
  • The Noetic Advisor mission ping appears roughly 675–690 meters east of the Lifepod in the lava vents biome.
  • The door stays locked because colonist Zip moved the code into a deep cave, placing his blackbox on a large purple root near a fiery coral or vent.
  • Surviving the route requires Heat Tolerance, which you unlock by clearing the Angel Comb with the Sonic Resonator, with upgraded oxygen, a Tadpole sub, or a Wavemaker advised.
  • After retrieving the code, returning to press the corridor button opens a safe room with breathable air and a NOA terminal that completes the mission.