Acquisition game

An acquisition game is played on a concave playing field defining a nadir with a plurality of movable game pieces removably disposed on the field for movement thereabout. Each player has an acquisition tool for removing at least one of the game pieces at a time from the field, the acquisition tool also being for moving the game pieces and an interposing member about the field. An interposing member (preferably in the form of an animal such as a crab) is removably disposed on the field for movement thereabout when the interposing member vibrates. The interposing member is substantially greater in size than any of the game pieces and defines passages therethrough configured and dimensioned to enable movement of the game pieces through the passages so that the interposing member impedes access of the acquisition tool to at least those of the game pieces in the passages. A motor is provided for vibrating the interposing member.