Vital statistics
Type Tetromino
Reflection O-Block
Rotations None
Maximum lines cleared 2

An O-Tetrimino (Often called a square) is a tetrimino arranged in a perfect square.(Obviously!) If it is rotated, it does not change. It is always two blocks in length by two blocks in width. This piece is quite troublesome among others, and mainly because it can't fit in any jagged areas in a person's matrix. However, in combos, they can be quite useful.