#3 Machinarium
A point and click adventure at heart, the dialogue-free Machinarium puts you in the shoes of a robot who has to save his robot girlfriend from an evil cult of robots threatening the robot city in which you live. Through every level, you must interact with the environment using your robot abilities to solve each puzzle and surmount every obstacle in your path.
The game is drawn completely by hand, in the unique style of its creators at Amanita Design, who also created the Samorost series of puzzle/adventure games.