Loop Logic vs Fathom

Loop Logic is a clean logic puzzle game where you draw one continuous loop around the grid using deduction and reasoning. Numbers in each cell show how many sides belong to the loop. Draw lines, mark impossible edges, and uncover the unique solution step by step. The rules are simple, but every puzzle rewards careful thinking. Features: • Classic single-loop logic puzzles • Multiple grid sizes • Difficulty from Easy to Expert • Smooth controls for drawing and marking • Clean design focused on readability • Quick undo and redo • Simple tutorial to learn the rules Relax, focus, and complete the loop.

A single loop, hidden inside the rules. Fathom is a calm, premium logic puzzle. Draw one closed loop across a grid of dots so that every number is satisfied — and every marker ends up exactly inside or outside the loop. No guessing, ever. Just you, a few numbers, and one loop waiting to be found. It sits in the Slitherlink family, but Fathom's marker twist makes it something new: you reason not only about the numbers next to each cell, but about the whole shape of the loop — what it encloses, and what it leaves out. HOW IT PLAYS • Draw a single continuous loop on a dot grid. • Each number tells you how many of its edges the loop must use. • Inside (●) and outside (○) markers must end up exactly where they say. • Mark edges out with an X as you rule them away — deduction made visible. • Stuck? A gentle hint shows the next logical step, never the answer. PURE DEDUCTION Every puzzle is solvable by logic alone and machine-verified to have one unique solution. There's no luck and no guessing — and no fail state. Explore freely; nothing punishes a wrong turn. CALM BY DESIGN No ads. No subscriptions. No timers forced on you. No streaks, no daily-login nags, no notifications. Fathom looks and feels like a quiet newspaper puzzle page — warm paper, clean ink, and nothing competing with the board. A space to think. BUILT FOR EVERY LEVEL Three difficulty tiers — Beginner, Medium, and Difficult — plus a guided tutorial that teaches the loop, the X-mark, and the marker mechanic step by step. Effectively endless, procedurally generated puzzles mean you never reach the end. ONE PRICE, YOURS FOREVER Start free, then unlock the full game with a single purchase. No subscriptions, ever. Fathom — a quiet puzzle for people who like to think.