Added the logic puzzle Slitherlink into the fold.
Draw a single loop which crosses the grid, with the numbered grid points having that many sections crossed over.[/highlight]
Added Slitherlink. It's a fairly standard puzzle game, but it's honestly not one I can manage to complete myself! Still, they generate well enough, and the solutions aren't always exact, so there's a bit of variety involved in the outcome.

Draw one large looping line touching various points on the grid. The numbers show how many of the sides of each box are filled with part of the loop.

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