Which, somewhat ironically, serves to underline Gears' one Achilles heel: the single-player game is shorter than you might wish. For us, we'll take Gears of War's intense, no-filler eight or so real-world hours over a lesser game's 20 - and it's a game you'll definitely want to replay on higher difficulty levels. Throw in the marvelously flexible co-op and versus multiplayer options and Gears of War has longevity enough for most, though if you really are stuck on your own you might burn out on it quicker than you'd like.
If you've been wondering why you lined up all night for an Xbox 360 this time last year, agonize no longer. This is the kind of game that sells systems, and if you have the merest action-loving bone in your body - and you can handle the gore, bad language, and short-ish play time -- it's pointless to resist. Gears of War is the best 360 game of 2006.