Counteract

From BoardGameGeek:

"It challenges your judgment and defies your sense of balance!" The game consists of a 20" plastic circular maze which is supported by a single central 18" rod connected to a tripod base. There are circular depressions around the circumference of the maze where steel balls are placed and thus affect the way the maze tilts. There are nine balls in all - eight smaller steel balls and a larger 'counteract' ball which is placed in the maze. The counteract ball must be manipulated into a depression located at the center of the maze by careful placement of the steel balls around the perimeter. Players must move three steel balls per turn. The first player who causes the counteract ball to roll into the central depression (the 'winner's circle') is the winner.