Keystone: Word Link Puzzles

Find the hidden connections. Complete the groups. Reveal the Keystone. Keystone is a handcrafted word-link puzzle game built around one simple challenge: sort 16 words into four connected groups of four. Some links are obvious. Others hide behind double meanings, shared themes, wordplay, categories, or unexpected associations. Solve all four groups, then answer the final Keystone question that ties the puzzle together. Play a fresh Daily Challenge, explore the full Journey, and build your longest streak as the puzzles become more demanding. Features • Daily Challenge Return each day for a new puzzle and keep your streak alive. • The Keystone Journey Progress through six chapters and 150 carefully arranged puzzles, from approachable openings to deeper connections. • More than 500 handcrafted puzzles Every puzzle is designed, reviewed, and tested for clarity, fairness, variety, and a valid solution. • Helpful gameplay tools Shuffle the board, clear selections, use hints, and watch for one-away feedback when you are close. • Multiple difficulty levels Easy, Medium, and Hard puzzles offer a steady challenge for both casual players and experienced word-game fans. • Game Center support Track and compare your longest Daily Challenge streak. • Play offline The full launch catalog is included with the app, so Journey puzzles remain available without an internet connection. • Optional ad removal Enjoy Keystone for free, with a one-time purchase available to remove ads. Keystone is made for players who enjoy word groups, hidden links, logic puzzles, associations, and satisfying “aha” moments. Can you find every connection and reveal the Keystone?