'Warhammer' was a tabletop battle game that began in 1983 and was previously known as Warhammer Fantasy Battle (WHFB), its last official edition (8th edition) was published in 2010. Warhammer was the generic name of a number of tabletop battle and roleplaying games marketed by UK firm Games Workshop. If you were looking for a character who uses a warhammer, that's Drop the Hammer (though the setting certainly isn�t lacking in this).