X (Xekkusu) is a puzzle game released for the Game Boy in 1992. The main objective revolves around clearing a grid by strategically placing and removing blocks to complete lines or patterns. Players must think ahead to avoid filling the screen, as the game ends when no more moves are possible.

The pace of Xekkusu is steady yet challenging, requiring careful planning rather than quick reflexes. A unique mechanic involves manipulating differently shaped blocks that descend onto the playfield, where each block’s orientation and position affect the available space. The player must fit these pieces in a way that maximizes space and clears lines efficiently.

Distinctive for its minimalist design and reliance on spatial reasoning, Xekkusu offers an unusual blend of block placement and pattern recognition. Unlike many puzzle games of its era, it emphasizes thoughtful arrangement over speed, creating a more cerebral experience. This focus on deliberate strategy sets it apart within the puzzle genre on handheld platforms.