The Tunnel is a horror film advertised in Grand Theft Auto III. It has the tagline "It's Dark Down There...in The Tunnel". Posters are seen in subway stations around the city. The "Tunnel" referred to in the movie title is actually a beta screenshot of the Porter Tunnel, seen in the poster, as well as the picutre of a beta Sentinel. The movie may be based on the 1996 film Daylight.
The movie is referenced in Grand Theft Auto IV. If the player loiters around the Alderney end of the Booth Tunnel, a security guard might tell the player he was hestitant to take the job here, as he heard The Tunnel was filmed in the tunnel.