The story will pick up years later as Tangles' sister tries to find out what happened to her brother in the tunnels.
- The writers/producers were quoted saying: "Initially, we weren’t anticipating doing another Tunnel film but the overwhelmingly positive reaction to the original – as well as our fans clamouring for another on an almost daily basis – made us go back and give it a second thought."
- The first movie raised money by selling individual frames at $1 per frame in their attempt to raise a budget of $135,000 (the equivalent of a 90-minute film). It was then released for free via BitTorrent and was the first Australian film to be available for download specifically on the iPad.
- The sequel to the 2011 Australian low-budget found footage flick The Tunnel.