Minefield was written in 1995 for the TRS-80 Model 4 by Richard VanHouten.

Mine Field is a strategy game for one person written in Model 4 BASIC for LSDOS 6.3. The object is to find all the mines in a minefield without setting them off.

You can move around the minefield using either the arrow keys or the numeric keypad (mines will not be set off by moving the cursor over them). To see what is under any one location, move the cursor to that spot, and press . If that site is next to a mine, a number (1-8) will be shown indicating how many mines are next to that spot. If it is not next to or on a mine, a blank space will be revealed, and all locations immediately adjacent to that blank space (or any additional blank spaces revealed in the process) will be shown. If the cursor is on a mine, all mines are set off in a chain reaction.

Open a square with [F1], mark a mine with [F3] and place a questionmark with [F2]. Level 1 is 10*10 with 10 mines and this increases up to Level 5 which is 80*20 with 320 mines.

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