Fahrenheit (known as Indigo Prophecy in North America) is an action-adventure game developed by Quantic Dream and published by Atari for Windows, PlayStation 2, and Xbox in September 2005.

The plot follows Lucas Kane, a man who commits murder while supernaturally possessed, and two police detectives investigating the case.

[8] Story details can change and three endings are unlockable depending on what the player does, including managing the protagonists' state of mind and pressing on-screen prompts.

[8][11] The left analogue stick is for movement, the right one will trigger actions like dialogue choices or grabbing objects, and both are needed to summon Lucas' paranormal abilities.

One night in New York City, a possessed Lucas Kane stabs a man to death in the restroom of a diner and then flees the scene.

In his efforts to rescue her, both perish,[20] but he is brought back to life by a group of artificial intelligence (AI) that seeks the Indigo Child, a young girl who carries a secret that grants unlimited power to whoever hears it.

[29] Due to lack of support from initial publisher Vivendi Games, the role was turned over to Atari, adding to the budget.

[31] His intention was to make something that would satisfy ex- and non-gamers, expressing frustration with the industry's repetitive nature and focus on younger demographics.

[33] The design document took him a year to finish, was composed of 2,000 pages, and required comprehensive directions to avoid any sudden alterations to the production.

[34] The films Snake Eyes (1998), Seven (1995), Jacob's Ladder (1990), and Angel Heart (1987) influenced the story and characters; Fight Club (1999) and Dune (1984) made an impact on the voice-over.

[42] Sex scenes were omitted from this version, but included in Fahrenheit: Indigo Prophecy Remastered, which launched for Windows, Android, iOS, Linux, and macOS in 2015, and PlayStation 4 in 2016.

[46][47][48] Executive producer Guillaume de Fondaumière claimed it was the highest-rated in its genre since Grim Fandango (1998) and considered the release a commercial success,[7][52] with over one million copies sold.

[58] Garnett Lee of 1Up.com praised the "disturbing" and graceful nature of the story as well as its combination with the gameplay, saying Fahrenheit had set a new standard for future aims of doing so.

[8] Raymond M. Padilla at GameSpy declared that "it's so good that it just might save a dying genre", regarding the plot and main characters to be well-written and the voice cast as one of the best of the year.

The feature of multiple playable characters was believed to have worked well, the action choreography and voice acting impressed him, and the soundtrack was described as gripping.

[51] Conversely, Lee expressed dislike to the "rather weakly implemented Metal Gear Solid-like stealth sections" and Fahrenheit's final third, which he perceived to be rushed.

[49] Navarro agreed with Lee on the ending and sneak sequences, criticising the former for its incoherent aspects and latter because it lacked engagement, matching the reason he disapproved of the puzzles.