Mack is a construction worker who just wants to do his job. Standing in his way are vandals and OSHA workers bent on seeing that Mack doesn't successfully complete buildings. Electronic Arts' Hard Hat Mack is fixed-screen action title with various construction areas, enemies, hazards, and important tools.
Each level contains a new theme with various items and tools. One level involves a structure with missing sections of floor. In order to climb the structure, Mack can use the elevator or various chain ropes attached to the actual construction site. In order to finish the level, Mack must place sections of floor into the correct locations, avoid a rock-throwing vandal and obtain a hammer. When Mack gets hit by a vandal, falls of the building or touches an enemy, he loses a life.
Another level contains a series of unconnected platforms, conveyer belts and a central lift mechanism that moves in a vertical fashion. Platforms are located on each side of the mechanism and hold various hazards and items. Hazards include metal shards and electrical currents. There are also tools located around the level. Whenever an item is collected, a number of points is awarded.