Minefield was written for the MK14 in 1980 by V. W. Morley.

If the program is executed at OF21, with the screen cleared, a minefield will be displayed. Pressing GO a second time sets in motion the tank, which is represented by an 'X' moving across the screen towards the mines. A mine can be jumped and defused at the same time by pressing the 'F' key on the Mk14 just before the tank collides with the mine. If the mine is hit the tank and mine are destroyed displaying 'BANG' where the mine was. A new tank then starts from the beginning and the score, which is displayed in the top left-hand corner of the screen, is incremented by one. When ten tanks have been destroyed the program stops. Pressing GO twice then reloads the minefield and starts the game again, with the last 'BANG' still displayed as the target to beat.

The game has 11 visible mines and you have 10 attempts to jump them with your tank. You move at a fixed speed and press [F] to jump immediately before hitting a mine. If you jump successfully the mine will disappear. If you hit a mine you lose a life and start back at the top of the screen. You can hold [F] to move more quickly across already cleared lines.

The Science of Cambridge MK14 was a microprocessor with a membrane keypad. The Practical Electronics article states the game will work with the VDU (Video Display Unit) published in an earlier October 1978 article. A few modifications are required to work with a MK14 VDU. The magazine column only published "the most original" ideas for "popular microprocessors".

The following attributes can be used to map the evolution of Minesweeper. Blue cells are confirmed attributes for official versions of Minefield. Yellow cells are unknown.