Herbert's Dummy Run is the fourth entry in a series of games featuring Wally Week and his family. Herbert is the small child of Wally who has become trapped inside a department store and must get to the lost and found department where his parents are waiting. The game is played in real time and allows four and a half hours to complete the game. Like other games in the series there are platforming elements and various puzzle solving sections that require the use of items found around the map.