The Third Shift casts players as a newly hired security guard at the Roanoke Museum of History, where they patrol exhibits on a Game Boy screen built around fixed CCTV-style viewpoints and point-and-click investigation. [1]

The game uses a nested 10:9 display and mixes scrolling segments with camera feeds. A notebook-style interface shows a recording icon and player stats while the guard watches the museum after hours. [1]

One of the exhibits is the Human Body display, which features plastinated cadavers. The intro also references the 16th-century Roanoke island disappearances, tying the museum setting to the historical mystery. [1]

The player carries a key for employee-only areas and a crowbar, even though the supervisor says the tool should be stored away. The supervisor may also be the threat behind the haunting, with some content shown discreetly from his point of view. [1]