Following success in New York, Hollywood and London, the concept of interactive theatre makes its debut in Sydney with the launch of Sydney Interactive Theatre’s inaugural production, The Messenger, from December 1.

Part game, part theatre, part tour and part bar crawl, The Messenger sees professional actors deliver a thrilling narrative through Sydney's historic The Rocks area, providing a unique experience previously unheard of in Sydney.

Taking elements from Sydney’s 1920’s gangster era and New York Italian Mafia scene, The Messenger follows the story of lovers Donnie and Rose who are on the run from the mob. The audience, aided by clues found in city locations including bars, wharves, back alleys and iconic landmarks, embark on a treacherous mission, interacting with shady characters along the way.

Sydney Interactive Theatre co-founder Daniel Harris said the engaging storyline and interplay between the cast and audience will keep participants thoroughly entertained throughout the performance.

"The Messenger will transport you to an underground world of crime, where you meet some insane characters that will really get your heart pounding," Mr Harris said.

"If you want to experience something truly unique in Sydney that is fun, exciting, spontaneous and very social, then The Messenger is a must see."

The interactive theatre experience also includes a couple of bar stops where participants can mingle with their fellow sleuths and work out their next steps, with food and drinks included in the ticket price.

How I met your mother star Neil Patrick Harris is a huge ambassador for interactive theatre. Harris has appeared on several American chat shows including Letterman speaking fondly about his own personal experience with Interactive Theatre.