In Countermove, you play the CPU in 20 levels of puzzle based action. Each player takes turns to capture an opponents counters and turn them into their own colour, in a similar fashion to Othello (or Reversi). To capture counters you must 'trap' a row of your opponents counters between two of your own.
The game ends when either player cannot place a counter on the board, and the winner is the one with the most counters in their colour.
Look out for special blocks which can obstruct your way, or give you a free go, or invert all the colours on the board!