GridLock Twist

Classic Sudoku rules. A new layer of locks. GridLock is a number puzzle game where solving the grid also means finding the right order to unlock it. Fill every row, column, and 3×3 box with the numbers 1–9 without repeats. Gold lock cells add a twist: tap a lock to see the three cells in its box that open it, then work out your next move. PLAY YOUR WAY Choose Easy, Medium, or Hard puzzles. Use pencil notes to mark candidates, and spend a clue when you need help with an empty, unlocked cell. TAKE ON THE DAILY CHALLENGE Play one shared puzzle each day with five minutes of active play time. Your first daily win earns two clues and extends your streak. Three incorrect entries end the run. COMPETE WITH GAME CENTER Connect optionally to compare daily completion times. Only a first-attempt daily win without clues or reasoning hints qualifies for the ranked leaderboard. Fastest time ranks first. KEEP YOUR PROGRESS Puzzle progress, statistics, and settings are saved on your device. No GridLock account is required. You can also export a progress backup from Settings. OPTIONAL EXTRAS Watch an available rewarded ad to earn a clue, purchase clue packs, or make a one-time purchase to remove banner ads. Removing banners does not remove optional rewarded ads. GridLock is free to download. Ads, purchases, and Game Center require an internet connection. In-app purchase prices and availability vary by storefront.