F.E.A.R. First Encounter Assault Recon is a 2005 first-person shooter psychological horror video game for Windows, PlayStation 3, and Xbox 360. Developed by Monolith Productions and published by Vivendi Universal Games, the Windows version was released worldwide in October 2005. The Xbox and PlayStation versions were ported by Day 1 Studios and released in October 2006 and April 2007, respectively. Two standalone expansion packs were released for the Windows and Xbox 360 versions of the game, both developed by TimeGate Studios; F.E.A.R. Extraction Point (2006) and F.E.A.R. Perseus Mandate (2007). Released on Windows in March 2007, F.E.A.R. Gold Edition includes all the content from the Director's Edition plus Extraction Point, while F.E.A.R. Platinum Collection, released for Windows in November 2007, includes the Director's Edition, Extraction Point, and Perseus Mandate. Neither expansion is now considered canon, as the Monolith-developed F.E.A.R. 2: Project Origin ignores the events of both.

The game's story revolves around the fictional F.E.A.R. (First Encounter Assault Recon) unit, an elite group in the United States Army tasked with investigating supernatural phenomena. When a mysterious paramilitary force infiltrates a multi-billion dollar aerospace compound, taking hostages but issuing no demands, the government responds by sending in a Special Forces team only to have them obliterated. Live footage of the massacre shows an inexplicable wave of destruction tearing the soldiers apart. With no other recourse, the elite F.E.A.R. team is assembled to deal with the extraordinary circumstances. They are given one simple mission: evaluate the threat and eliminate the intruders at any cost. The player takes on the role of the unit's newest recruit, Point Man, a man with a dark past and extremely short reaction time, leading the character through countless firefights and witnessing paranormal manifestations conjured up by a mysterious little girl dressed in red.

Although the atmosphere of the game was heavily influenced by Japanese horror, Monolith's primary goal with F.E.A.R. was to make the player feel like the hero of an action film. To this end, they combined a slow-motion technique called "reflex time", a semi-destructible environment, and a highly detailed particle system in an attempt to create as immersive an environment as possible. Another vital element in this is the game's AI, with Monolith employing a never-before-used technique to give hostile NPCs an unusually broad range of actions in response to what the player is doing. This results in NPCs who can also work as a team, such as performing flanking maneuvers, laying down suppressive fire, and attempting to retreat when under heavy fire.

Upon its initial Windows release, F.E.A.R. was very well received, with the AI garnering particular praise. Critics also lauded the graphics, atmosphere, sound design, music, and combat mechanics. Common points of criticism were a lack of enemy variety, a weak plot, and repetitive level design. The Xbox 360 version was also well received, but the PlayStation 3 version met with mixed reviews, with many critics unimpressed with the port's technical issues and graphical inferiority. It was a commercial success, selling over three million units worldwide across all three systems.

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