The original. Only a radius around you is ever visible — navigate the fog by memory.
Fully visible, but the ice shifts between Stable and Shifting every 15 moves.
Something blind lives in the water with you, and it hunts by feeling every move you make.
Your reflection mirrors your every move — get too close to the glass and it cracks.
Race three rivals starting in the other three corners of a fresh 35×35 maze.
Timed gates swing open and shut on a fixed rhythm — time your crossing.