Understand is an experimental puzzle game about guessing rules. In each level, you have to figure out the rules through trial and error, then draw a line satisfying all rules.

Explore a vast, mysterious castle riddled with secret rooms and challenging puzzles in this award-winning puzzle adventure.

Move the pieces of place and untangle the wool yarn for these cute kittens.

A girl named Mia is locked inside a school. Help her escape by solving puzzles and riddles, as well as finding hidden objects along the way that open the doors of every single room she finds herself trapped in.

Welcome to a realm of pure logic, where rules are rules and the next step can always be deduced.

Sequel to the best-selling escape room game, brings a fresh take on first-person puzzles with a variety of new rooms to explore solo or with friends. Solve intricate puzzles, uncover hidden secrets, or craft your own escape rooms with Room Editor 2.0.

This is a text-based adventure puzzle game, where you must struggle to survive in a world filled with ghosts and urban legends. While collecting clues, you'll uncover the truth behind the world and find the way out. The game features a wealth of levels, unconventional rules, and a touch of horror.

Replicube is an open-ended programming puzzle game/toy about writing code to replicate 3D voxel-based objects.  Solve puzzles, pursue leaderboard glory, or just make art to share with the in-game community.

The spiritual successor to The Incredible Machine from its original designer and programmer. Play 100s of puzzles. Build and share elaborate contraptions with an huge variety of parts and critters.

Quite a different zombie game - this time YOU are the zombie! Command your infested comrades, fight your way to freedom and let the zombie kind dominate the world! Oh, and you're able to create your own scenarios!