The History of Minesweeper: Mainframes, Windows and Logic Puzzles

Almost everyone who has used a Windows PC has clicked into a grid of grey squares — but the story of how Minesweeper got onto hundreds of millions of computers is stranger and more human than you might expect. It starts with one engineer teaching himself a graphics library, runs through a $39.95 box of office time-wasters, and ends with a puzzle so beloved that people protested when its mines were deemed offensive. Here is how Minesweeper became a permanent fixture of computing.

An OS/2 side project in 1989

The Minesweeper the world knows began as a learning exercise. In 1989, a Microsoft engineer named Curt Johnson — hired that year to maintain a debugger for IBM's OS/2 — wrote a small game called "PM Mine" to teach himself OS/2's graphical environment, the Presentation Manager. He named it after his favourite Macintosh game, "Mine," and the windowing system he was learning. Because Microsoft Paint was black-and-white at the time, he even had to write his own colour bitmap editor first; the editor and PM Mine were among his earliest programs. The object of his version was to cross a minefield from the bottom-left corner to the top-right using the number clues.

Robert Donner brings it to Windows

Johnson shared his source code with a colleague who had joined Microsoft the same year, Robert Donner. Donner released "PM Mine 2.0" in May 1990 — crediting Johnson for the original programming and himself for additional work — and then, when Windows 3.0 launched on 22 May 1990, he re-wrote the game for Windows as "Win Mine." The game became notorious inside Microsoft for how addictive it was; by one well-worn account, even Bill Gates got hooked.

The Windows Entertainment Pack, 8 October 1990

Windows 3.0 was a hit, and Microsoft decided the new operating system needed games. Employees were invited to submit programs, and the result was the Microsoft Entertainment Pack for Windows, released on 8 October 1990 with seven games and a screensaver for $39.95. It was the first collection of games Microsoft built for Windows 3.0 rather than MS-DOS, and it shipped under the cheerfully honest slogan, "Now you can use the incredible power of Windows 3.0 to goof off." Minesweeper was one of those games — and quickly the standout. The pack sold so well that Microsoft put out three more, and the first one was retroactively renamed "Microsoft Entertainment Pack 1."

Bundled with Windows 3.1 in 1992

Minesweeper's real leap to ubiquity came in 1992, when Microsoft included it in the standard installation of Windows 3.1, where it replaced the older board game Reversi. Alongside Solitaire, it served a quiet practical purpose for a generation of office workers who had never used a mouse: revealing cells with the left button and flagging with the right was a gentle, even fun, way to drill precise mouse control. For millions of people in the 1990s, Minesweeper was simply there, one click away on every office and home PC.

The classic three difficulties

The Windows version settled on the three board sizes still treated as standard today: Beginner at 9×9 with 10 mines, Intermediate at 16×16 with 40 mines, and Expert at 16×30 with 99 mines — plus a Custom option for any size you liked. Those numbers became the shared yardstick for an entire competitive scene that grew up around beating them as fast as possible.

Where Minesweeper came from before Microsoft

Microsoft did not invent the genre, and the exact lineage is debated. TechRadar credits 1990's Microsoft Minesweeper as the first true Minesweeper; Eurogamer points instead to "Mined-Out" (1983) by Ian Andrew as the earlier ancestor. Curt Johnson himself has said his game's design was borrowed from another game — while specifically denying it was Mined-Out. Various histories trace a longer chain of mainframe and early-PC mine-avoidance games stretching back to the 1970s. What is certain is that Donner and Johnson's Windows version is the one that turned a niche idea into a household name.

The campaign to ban the mines

Popularity brought controversy. Around 1999–2001, a group calling itself the International Campaign to Ban Winmine argued that the game was insensitive to the victims of real landmines, and proposed replacing the mines with flowers. Microsoft did, in some localised versions, ship a "Flower Field" reskin in response — a small footnote that shows just how culturally visible a bundled puzzle game had become.

Leaving the Start menu — and living on everywhere

Minesweeper shipped with every version of Windows up through Windows 7 — the Vista and 7 editions were rebuilt by Oberon Media — but it was dropped from the default install with Windows 8 in 2012. It did not disappear; it moved to the Microsoft Store as a free download (a 2012 version handled by Arkadium and Microsoft Casual Games), and it scattered into countless web and mobile clones. Today Minesweeper is less a single program than a permanent fixture of computing culture — a puzzle simple enough to learn in a minute and deep enough that people still compete over it decades later. That is the same classic game, first-click-safe and number-driven, that you can play right here in your browser.