Steam Makes 96% Positive Puzzle Game Completely Free

Summary
Hexologic is free to keep on Steam for a limited time. Claim this relaxing Sudoku-inspired puzzle game and solve more than 90 levels.
Description from Polygon.
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Steam Makes 96% Positive Puzzle Game Completely Free
Hexologic is free to keep on Steam for a limited time. Claim this relaxing Sudoku-inspired puzzle game and solve more than 90 levels.