The Tetromino Match Puzzle Room is located through the purple door in the first room of the Ancient Walls. It features 4 blocks and a pedestal with 4 tetromino symbols. The goal is to align the blocks so it matches every symbol when switching perspectives, as correctly doing so will trigger an Anti-Cube at the top.
Trivia[]
- There used to be an issue where the blocks auto-solved themselves after changing save slots. This bug was fixed in Version 1.12.