One Letter Off.
Three famous titles. Change exactly one letter, write a one-line description of the new thing. AI grades the wit.
One Letter Off is a word game built for the short window between meetings. The round is self-paced, with 1 attempt before the score locks. Letters, language, the occasional pangram. The team-wide leaderboard rebuilds itself daily, so the only thing carrying from yesterday is bragging rights.
- 01GoalChange exactly one letter in the title (substitute, add, or remove). Then describe the new “show” in one sentence.
- 02ExamplesBreaking Bad → Braking Bad: a driving instructor's slow-burn breakdown. Game of Thrones → Game of Phones: warring families, but it's group chats.
- 03ScoringAI grades each round 0–100 on cleverness of the title twist and the punchiness of the description. Three rounds, max 300.
- 04TipThe title sells the joke. The description should land in 10–20 words.
Common Thread
16 words, 4 hidden groups. Sounds easy until you realise "bass" could go in three of them.
Read about it →Five Letters
Guess the 5-letter word in 6 tries. You already know how this works. You're addicted.
Read about it →Cipher
Crack the substitution cipher. Every letter has been swapped — figure out the mapping. Fastest solve wins.
Read about it →Common questions
Is One Letter Off free to play?+
Every team gets a 30-day free trial with full access to One Letter Off and the whole game library, no credit card. After that the library stays unlocked on Pro at $39/mo flat for the whole team.
Do I need to download anything to play One Letter Off?+
No. One Letter Off runs in any modern browser on desktop or mobile. The version on Halftime is the full game, with no app to install.
Can my whole team play together?+
Yes. Halftime gives every teammate the same daily game and lines up their scores on a shared leaderboard. Connect Halftime to Slack or Microsoft Teams to drop scores into your channel as they come in.
There are plenty more waiting.
Set up your team in under a minute. One daily slot, all six categories, your record book starts the second you arrive.