Color Cross is a puzzle game for the Nintendo DS where players use logic and deductive reasoning to fill in grids with colors to reveal hidden images, similar to nonograms or picross. Each puzzle presents a grid with numbers on the rows and columns, indicating how many squares should be filled in with certain colors. By cross-referencing these clues, players determine the correct placement of colors, progressing through levels of increasing complexity. The game features a vibrant interface and a variety of picture puzzles, offering a satisfying challenge for fans of brain-teasing games.