Puzzle by Nikoli V: Slitherlink

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Puzzle by Nikoli V: Slitherlink is a logic-based grid puzzle where you draw a single continuous loop around numbered cells. Each number tells you how many of its four sides are part of the loop. Using pen and paper mechanics adapted for touch controls, you'll trace paths that satisfy every clue while avoiding contradictions. The rules are simple but the challenges escalate quickly as grids grow denser and patterns more deceptive. This PS Vita port of a classic Japanese puzzle features 50 problems ranging from beginner to expert. The lack of time limits or penalties lets you focus purely on deduction. While there's no online leaderboard or extra content, the clean design and gradual difficulty curve have kept it a favorite among logic puzzle fans since its 2012 release.