It's a cross between Gomoku and Othello:
Two players alternate placing a disk on the board.
The object is to get n in a row on a nxn-board. Example: 8 in a row on a 8x8 board.
Moves are made just like regular Othello, with flipping in all legal directions.
 
The history on this game is as short as this sentence, being Roland Johansson's first succesful 'new' game for Zillions of Games.