From "Grand Theft Auto IV" and "Metal Gear Solid 4" to "Fallout 3" and "Gears of War 2," the majority of 2008's smartest games have one thing in common (besides numbers in their titles): They're rated M, as in Mature, meaning you have to be 17 or older to buy them.
But an M rating isn't necessarily a guarantee of quality. Less ambitious developers will serve up blood, guts, profanity and maybe even a little nudity to be "edgy," but if they don't deliver rich gameplay and satisfying stories, they aren't likely to hold the interest of adult players. The three games reviewed here earn their M ratings, but may not earn your loyalty.
-"Left 4 Dead" (Electronic Arts, for the Xbox 360)
-"Saints Row 2" (THQ, for the Xbox 360, PlayStation 3)
-"Legendary" (Gamecock, for the Xbox 360, PlayStation 3)