This side quest has players use the Anti-Gravity mechanic in the Undercroft to wall run across six blue tiles to reveal the BRM Wall Buy for 1800 points.
This does not have to be within one Anti-Gravity session and touching the floor does not reset your progress.
You must have activated Anti-Gravity to begin this quest by standing on each of the four tiles around the pyramid in the Undercroft until they glow blue.
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