Despite the minor nitpicks, this is a great game that has sleeper hit written all over it. The guys at Headfirst Productions certainly did their homework and researched the material before making the game. The end result of their labor is a rock-solid videogame that almost perfectly captures the dread, majesty, and sheer abject terror of Lovecraft's world.
According to ESRB, this game contains: Blood and Gore, Intense Violence, Strong Language, Use of Drugs and Alcohol
More than anything else, Call of Cthulhu: Dark Corners of the Earth truly captures the dark, oppressive and even hopeless feel that many of Lovecraft's stories have in common. Walking through the town of Innsmouth in Jack Walters's shoes was exactly the way I had imagined it to be when I first read the source material, and as Mike says, the attention to detail and small touches of realism help embellish the experience and make it a (mostly) believable, immersive adventure.