You play on an arcade machine and move at a constant speed. Every cell you visit is marked. You cannot visit a cell that has already been visited and you cannot touch the edge of the screen. Two players compete to stay alive and win the most rounds.
Blockade inspired the "Snake" genre.
The following attributes can be used to map the evolution of Minesweeper. Blue cells are confirmed attributes for official versions of Blockade. Yellow cells are unknown.