Modern Wafare 2

This is by far and away the best game this year. Here is a little background on the game. If you don't want to read this below, you could just watch the high definition video.

Special Ops:
A cooperative mode entitled Special Ops will feature in Modern Warfare 2, comprising of isolated missions similar in design to the "Mile High Club" epilogue mission from Call of Duty 4: Modern Warfare. These missions will take place in a variety of locations from the campaign mode, but will not be related to story of the campaign itself. Special Ops will support cooperative play for up to two players. Scenarios include a snowmobile race, a battle alongside U.S. Navy SEALs, and fending off a wave of 50 enemies at once.
Multiplayer:
The multiplayer mode of Modern Warfare 2 retains the experience points and unlockable rewards system of Call of Duty 4, and introduces several new features. Aside from new weapons and equipment, 15 different kill streak rewards can be unlocked and selected by the player. Among these is the ability to call in a strike by an AC-130 gunship after achieving 11 enemy kills.
Plot:
Modern Warfare 2 is set several years after the conclusion of Call of Duty 4: Modern Warfare. Sergeant "Soap" MacTavish, promoted to captain in the Special Air Service, returns as a non-playable character and the head of Task Force 141, an elite, multinational commando unit. The player will take on the role of Sergeant Gary "Roach" Sanderson, a member of the Task Force.The radical Russian Ultranationalist organization has returned to prominence under the leadership of Vladimir Makarov, a former associate of Imran Zakhaev with his own ambitions. Makarov has publicized Zakhaev's death as an act of martyrdom to garner support for his cause, enabling him to build a strong power base in Russia over the years. Fearful of Makarov's growing influence, the global community established Task Force 141 to counter the threat posed by the resurgent Ultranationalists.Mission settings in Modern Warfare 2 will include Russia, a military base in Kazakhstan, a desert area in Afghanistan, and Rio de Janeiro, Brazil.