Code 777

This clever little game combines the elements of a good, logical deduction game and Indian poker. Each player receives a rack for keeping three tiles drawn from a pool of tiles, which are seven different numbers in seven different colors (28 tiles in total), however the rack is turned away from you. When players sit in a circle, each player can see everyone else's tiles, except their own. Each turn, players draw a card with a question like, "Do you see more yellow sevens or more blue sevens?" which should help the others' determine their tiles. Once you're reasonably sure, then you can take a guess. But if you're wrong, you have to start over with a fresh set of tiles...

Code 777 was explicitly inspired by What's That on My Head? and Alex Randolph credited Robert Abbott with co-designing it based on this.

In 2010, Stronghold Games released Code 777 in a 25th Anniversary Deluxe Edition, adding both a 5th player and symbols to make the game colorblind-friendly.

From the Stronghold Games version of Code 777:

The classic code-cracking game is back in a 25th Anniversary Deluxe Edition!

Crack your code first! You can see your opponents' codes but not your own. Using questions and logic, try to deduce which three numbers are hidden in front of you. Once you're reasonably sure, then you can take a guess. But if you're wrong, you have to start over with a fresh set of tiles...

This 25th Anniversary Deluxe Edition of Code 777 has been expanded to allow for up to 5 players (from the previous 4 player editions). All of the components have been upgraded to the highest-quality levels. And our Code 777 is also the first edition to be colorblind friendly! Stronghold Games is proud to bring this great deduction game back into print by popular demand after being unavailable for over 10 years worldwide.

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What's That on My Head?
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