Halloween at the Portal. The Hollow, a haunted cipher maze, is free to play until 2 November. Enter The Hollow

3 stages · Hard · Premium

VISUAL ENIGMA

📜 Briefing
Two images were recovered from a construct. Neither looks like anything — until you stop looking at them the way the machines intended.
  1. 1 Stage 1: Colour Channel Analysis
  2. 2 Stage 2: LSB Steganography 🔒 opens with stage 1's answer
  3. 3 Stage 3: Final Synthesis 🔒 opens with stage 2's answer

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Scored puzzles need a free account: your time and hints are tracked by the server, points go on the leaderboard, and each answer unlocks the next stage.

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