HexaLines is a well-known and popular strategy puzzle game that came from Windows Mobile over to Windows Phone and Windows 8 last year. The game works on a simple principle of trying to connect pipes using hexagons to keep the red liquid flowing. HexaLines uses a fun AI to try to block your moves, making this game similar to chess. The mechanics and gameplay are highly rated, with many people giving the game solid ratings (4.3 out of 5 stars).
HexaLines is normally a $1.49 game but for the next few days, it is completely free due to participating in the myAppFree promotion. That means there is no reason not to grab this game right now, as once you lock in that license it is free forever!