Flow Free

Flow Free is a puzzle game for iOS and Android released by American studio Big Duck Games in June 2012.[1]

The game presents Numberlink puzzles: each puzzle has a grid of squares with colored dots occupying some of the squares. The objective is to connect dots of the same color by drawing ‘pipes’ between them such that the entire grid is occupied by pipes. However, pipes may not intersect. Difficulty is primarily determined by the size of the grid, ranging from 5×5 to 15×15 squares. The game also contains additional paid packs as well as a time trial mode.[2][3] Whenever a level is completed, a check mark will appear on the level select icon to indicate that the puzzle is solved, while a star indicates that the player finished the puzzle with the least number of moves required.

Big Duck Games has also released three expansions in the series. The first expansion, “Flow Free: Bridges”, was released on November 8, 2012 at a fixed price. In this expansion, pipes can be made to intersect through pre-made bridges.[4] The second expansion, “Flow Free: Hexes”, was released on October 12, 2016, and features both free and paid premium puzzles. The gameplay is similar to “Flow Free” except the layout resembles hexagons instead of squares.[5] The third expansion, “Flow Free: Warps”, was released on August 8, 2017.[6] This expansion allows you to have pipes warp from the edge of the map to the other edge of the map.