From ebgames.com:

Call of Cthulhu -- Dark Corners of the Earth is a first-person horror game that combines intense action and adventure elements. You will draw upon your skills in exploration, investigation, and combat while faced with the seemingly impossible task of battling evil incarnate.

* Diverse array of levels including Innsmouth town and Deep One City

* Dynamic Sanity system resulting in hallucinations, panic attacks, vertigo and paranoia!

* Full interaction with large cast of non-player characters

* Incredibly detailed realtime graphics with atmospheric lighting and dynamic shadows

* Intelligent gameplay involving puzzle solving as well as combat and exploration

* 1920s weaponry and vehicles

* Lovecraft's famous monsters and locations