Puzzle

Description from the publisher:

With a grinding of gears and some uneasy rumbling, Aperture Laboratories has resumed testing! Your team of test subjects has entered the Lab and is ready to perform all sorts of important, dignified, and dangerous testing procedures...all in the pursuit of cake! It's a fun and funny fast-paced fight to the finish — and by finish, we mean your team probably died.

The Lab is an ever-changing conveyor belt of death and dismemberment. But SCIENTIFIC PROGRESS must be at the forefront of the mind of every good test subject. In Portal: The Uncooperative Cake Acquisition Game, a game of constantly shifting area control and cardplay by the creators of the Portal and Portal 2 video games, players move and Portal their test subjects to various chambers in the lab. At the end of each player's turn, one of the chambers on the end of the lab gives way, plunging all test subjects on it into oblivion. But should your test subjects have numbered greater than all others in the falling chamber, they earn you some wonderful parting gifts, which can include cake.

Yet these moist slices of industrial-grade cake must be stored in the lab where they are at risk of falling into said oblivion. Not to mention that your jealous opponents can pick up your cake and move it closer to that precipice. He who has acquired the most cake when a team has lost its last test subject wins. Do you risk gathering cake early for a quick win? Or do you bide your time and wait until you can protect it better? Win the game and prove the cake was no lie.

Each player takes on the role of a "Geist Hunter" and the first to catch their set of Geists and get them safely to the underworld wins. To catch Geists, you need to lure them with an exact number of Zingiberi chips. These are earned by moving around the board and landing on numbered squares. The number lets you take or return a chip of that value, but also determined how far you will move next turn. A clever movement system encourages people to cheat and get away with it, or at least makes everyone watch closely. Each Geist, once captured, can also be use to "prank" other players, and this keeps things rowdy but also adds to the strategy. Chili Pepper cards also spice things up since the Geists don't usually like them.

A game of blind man’s bluff based on shape recognition.

Made by Ravensburger in 1982 for 1-4 players Ages 4 - 8.
A slightly altered edition in a smaller box with only two masks was published in 1986.

Contents include: 60 shapes, 4 different masks, 1 bag, plastic storage tray, and the instructions.

OBJECT: players try to identify various different shapes using their sense of touch, or using their memory. There are four different games that you can play and instructions for them.

Game description from the publisher:

In the puzzle game Dimension six task cards are laid out each round, with these cards dictating how the balls in the game should be stacked on top of one another and side to side. These challenges aren't easy as some colors shouldn't touch one another.

Fast puzzle-solving is important, but more than that in the end whoever solves the most of these difficult tasks wins.

NOTE: IMPORTANT RULE CORRECTION

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?
Amnesia
Egghead
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Coyote
Am I a Banana?
Hanabi