Mastermind
The game that I played was Mastermind. Mastermind is a game where you have to guess a code that includes 4 colors. You have 8 colors to choose from and you can guess a sequence of 4 colors from those 8 at a time. When you guess a code, red and white pegs are placed into 4 slots to determine how many colors are correct. A red peg means a color is correct and in the correct spot, and a white peg means a color is correct but in the wrong spot. Although you get this information, you do not know which colors are correct, and that is where you have to do the rest of the thinking.