From CNN Article found hereThe PC version includes high-resolution graphics and 3-D sound, the latter of which can be helpful to determine nearby enemy activity. Depending on the sound card used, "Manhunt" supports various audio technologies including Creative's EAX and Microsoft's DirectSound.
"Manhunt" delivers an intense stealth action game experience, wrapped in this disturbing, futuristic premise. Because the player starts each level at a disadvantage -- outnumbered and with no weapons -- the game does a fantastic job at building suspense and anxiety.
Manhunt Website @ Rockstar Games