No brain teaser is unsolvable if you think hard enough. With this game, you can test how good you are at solving puzzles, riddles, etc. There are lots of levels for you to conquer and the difficulty increases as you progress further into the game.

This is perfect for people who loves a good riddle and have a knack for figuring out picture puzzles.

It is called Brain Puzzle: 3D Games and it is developed by Gamejam. Since it is a free android app, you won't have to pay a single penny to enjoy it on your phone or tablet. You can play for as long as you want.