frozen observatory
com.frozenobservatory.sudoku
FreeEveryone
Launch numbers
1K+Installs
n/aRating
Sep 20, 2026Released
Oct 4, 2026Updated
What it is
Tap an empty cell to cycle 1-4. Every row, column, and 2x2 region needs each
frozen observatory. Tap an empty cell to cycle 1-4. Every row, column, and 2x2 region needs each digit once.