Door2:Key

Why do people solve puzzles?
What is the true intelligence?
Who started this tricky game? You must find out all of this in a breathtaking and mysterious door-puzzle game in which any little thing could be a key to the solution.

Get ready for an adventure and bunch of virtual worlds to solve the main mystery. Dive into relaxing atmosphere and enjoy the surroundings. Explore the secret locations and find the well-hidden mysteries and puzzles to get to the truth.
The main goal is simple - you have to choose correctly and enter one of the four doors
Secret locations and hidden places are crucial for understanding the plot
You will encounter lots of different logic, number, lie detection and environmental puzzles, and sometimes it is important to think outside the box to find the solution
Use your surroundings as keys to the doors
Discover a connection with the Door Part 1 and learn all of its secrets