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Puzzle Games

Puzzle games are the games that you really have to put your thinking cap on for. They involve taking in knowledge and using it to make informed decisions on what to do next. A great example is Sudoku, where players are forced to use the process of elimination to determine what number to put in each box. While puzzle games may look boring on the surface, once players start to understand them they often realize just how much fun they are.
Color Theory
Fireboy and Watergirl
Portal: The Flash Version
Sugar Sugar
Sugar Sugar 2
Super Stacker
Whizz Words Deluxe