Monochrome Worlds is a simple puzzle game where players must two people reach a common goal. These two people, one of them black and the other white, live in different worlds and must work together in order that both of them reach the gray-colored spot, which is the only place where they can share the same space.

Monochrome Worlds is a remake of a Flash-based game called Monochro Observer created by Tatsuya Koyama. The motivation behind the remake was to be able to play the game in environments that have no Flash players available, such as the GP2X.,0,0,0,25,2759