It's indirectly stated that this game takes place in the year 2009.
When Tyler is checking a bookstore, the owner asks him to find a book by De Gruttola. In real life, De Gruttola is David Cage's full name.
Director David Cage changed the name of the game in the US to "Indigo Prophecy". He said that he wanted to change all versions of the game to Indigo Prophecy, but the game had become too well known in Europe as "Fahrenheit" to make that possible.
Originally was slated to be delivered in episodic format but was changed to a full length retail game.
The voice for Lucas Kane and Tyler Miles is the same voice actor, David Gasman.