Strategic Word Battles โ€” Outsmart Your Opponent One Letter at a Time

It's like Wordle meets chess. Change one letter per turn, create new words, trap your opponent โ€” and win. Play friends, climb rankings, and conquer the Daily Gauntlet.

๐ŸŽฎ Try Free Demo โ€” No Signup Required Start Playing Free ๐Ÿ”’ Daily Gauntlet

โœ“ No credit card required  โ€ข  โœ“ Instant play  โ€ข  โœ“ Core game free (premium features optional)

Perfect for word game enthusiasts, strategy lovers, and anyone who enjoys a quick mental challenge. Players worldwide have already made Hundreds of moves this month.

See It In Action

Watch how strategic thinking and word knowledge combine in this unique battle of wits.

๐ŸŽฎ Try Free Demo Now Start Playing Free ๐Ÿ”’ Daily Gauntlet
Hundreds of moves made this month
Join thousands of players in the ultimate word strategy battle

What Players Are Saying

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"Such a fun and inventive game! Great job!"

โ€” Kzulock, 18 games played

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"Loving this game! A fun word play concept thatโ€™s executed very well, with a competitive aspect added by the leaderboards, achievements and elo. I highly recommend."

โ€” Matt T., 45 games played

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"I'm truly addicted to this game. Very challenging and fun to play. The Blitz mode is incredibly fast paced. Trains your mind to think quicker!"

โ€” Mike J, 93 games played

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"Chess meets word games. You have to think several moves ahead to trap your opponent. Way more strategic than I expected. The post-game analysis actually teaches you to improve."

โ€” Jordan, 362 games played

How It Works

๐ŸŽฏ
Start with a Word
Each game begins with a random 5-letter word from our 14,000+ word dictionary.
โœ๏ธ
Change One Letter
On your turn, change exactly one letter to create a new valid word. You can't change the letter your opponent just changed.
๐Ÿ†
Trap & Win
Force your opponent into a corner. The first player who can't make a valid move loses. Win 2 out of 3 games to win the match!

Why You'll Love Letter Lock

๐ŸŽฎ Multiplayer & Ranked Mode

Challenge real players worldwide or climb the ELO leaderboard. Every match counts toward your ranking.

๐Ÿค– Smart AI Opponents

Train with multiple difficulty levels from beginner to expert. Sharpen your strategy before taking on real players.

๐ŸŒ€ Daily Twists

A new optional rule every day โ€” speed limits, letter bans, lock changes, and more. Opt in when starting a match or pick any twist you want.

๐Ÿ”’ Daily Gauntlet

A new challenge every day against the toughest AI. Beat it and share your replay to show off your skills.

โšก Blitz Mode

Fast-paced, 10-second turns. Think quickly or get locked out. Perfect for quick mental workouts.

๐Ÿ… Achievements & Stats

Earn badges, track your win rate, and watch your skills improve over time. Compete on global leaderboards.

๐Ÿ“š Huge Word Library

14,000+ valid words ensure endless variety. No two games are ever the same.

๐ŸŒ€ Daily Twists

Every day brings a new optional rule change. When you start a match or play AI, opt in to today's twist โ€” or pick any twist from the list.

Today's twist
Shrinking Dictionary

Every 5 moves, a new starting letter is banned โ€” words cannot begin with banned letters.

Sunday Hard Bones
Monday Speed Day
Tuesday Raw Mode
Wednesday Double Trouble
Thursday Vowel Movement
Friday Letter X
Saturday Shrinking Dictionary

Twists are optional โ€” standard rules apply if you leave the box unchecked. Learn how each twist works โ†’

Ready to Start Playing?

Try the free demo right now โ€” no signup required. Or create an account to save your progress and challenge friends.

๐ŸŽฎ Try Free Demo Now Start Playing Free

Frequently Asked Questions

Yes! Letter Lock is free to play. You can try the demo without signing up, or create a free account to play multiplayer games, challenge friends, and compete in daily challenges. All core gameplay features are available at no cost โ€” premium features are optional and don't affect gameplay.

Optional Supporter Subscription ($3/month): For those who want to support development and unlock premium features, we offer an optional Supporter subscription that includes:
โ€ข Unlimited game analysis with move-by-move breakdowns
โ€ข Teaching tips based on your gameplay patterns
โ€ข Additional themes
โ€ข Cancel anytime โ€” no commitment required
Letter Lock features over 14,000 valid 5-letter English words, ensuring endless gameplay variety and strategic possibilities.
Yes! Letter Lock includes AI opponents for practice. You can also challenge the toughest AI in the Daily Gauntlet mode, which offers one attempt per day.
Daily Twists are optional rule changes that rotate every day โ€” things like faster turn timers, banned letters, or earlier lock positions. When you challenge someone or play AI, check the twist box to opt in. You can use today's twist or pick any mode from the list. Matches without the checkbox use standard rules. See the full schedule and rules โ†’
The Daily Gauntlet is a special challenge mode where you face the toughest AI opponent. You get one attempt per day, and the challenge resets daily. Track your streaks and compete on the leaderboard!