Minesweeper is a logic puzzle set on a square board. The object of the game is to find all the hidden mines.
We've got a beginner minesweeper board, and there is also an intermediate minesweeper game, and an expert minesweeper board.

Process a tile to test if it is a mine. The number of mines in the areas around that tile will be revealed.
Long process a tile to plant a flag and mark a square as containing a mine.
You win the minesweeper game by marking all the mines with flags.
If you click on a mine, you die!