100 Doors 2021: Escape from R is a free puzzle game available on Android platform developed by Norboo Developers. This game is designed to give your brain a workout by solving puzzles and escaping through every door. The game features addictive and challenging puzzles that are solved by logical thinking and intuitive usage of your phone. With constant updates of new doors, the game offers a well-developed platform that utilizes your device to the maximum.

The game has various theme backgrounds and amazing levels with really nice animations. The game's main goal is to solve a puzzle and open the doors to escape from the room. The game requires you to think outside the box and pick up items and use them from your inventory to help you find the solution. The game is not only challenging but also fun to play with your friends and family.

Overall, 100 Doors 2021: Escape from R is a well-designed and addictive puzzle game that offers a great brain workout. With the game being completely free to play, it is definitely worth a try for anyone who enjoys puzzle games.