Minesweeper

Minesweeper is the puzzle game included with Microsoft Windows from 1990 onward, in which players click squares on a grid to reveal numbers indicating how many adjacent squares contain mines.

The goal is to uncover all safe squares without detonating a mine.

For many computer users, Minesweeper was their first encounter with logic-based puzzle games: I finally beat Minesweeper on expert difficulty. (Lowercase minesweeper is the naval vessel or the game generically.)