Zyconix for DOS, released in 1992, is a colorful and fast-paced puzzle game similar to Tetris but with its own unique twist. Players drop pairs of colored blocks onto a grid, aiming to match and clear them by forming horizontal or vertical lines of the same color. As levels progress, the game speeds up, requiring quick thinking and sharp reflexes. With catchy music and addictive gameplay, Zyconix became a memorable shareware puzzle hit.