Traditional reversi with a non-traditional twist. GravityReversi adds a gravitational constraint where stones fall in columns to the bottom of the board. New players and reversi experts will be amazed at the complexity added from such a simple constraint.The objective is to end the game with more stones on the board that your opponent. You can play against the computer in Beginner Mode, Normal Mode for free. With an in-app purchase you can try your skill versus the computer in Expert Mode or challenge a friends using pass-and-play.