As one of the most critically acclaimed shooters of all time, Call of Duty 4: Modern Warfare is a prime example of a tough act to follow. Yet, amidst a raging storm of anticipation and expectation, Call of Duty: Modern Warfare 2 has done it. The new campaign is chock-full of intense action and dramatic moments, and though it is more muddled than its predecessor (in more ways than one), it's still an absolute blast. The new Special Ops mode allows you to experience some campaign-inspired thrills with a friend and it's an engaging challenge to coordinate your maneuvers and tackle the varied objectives. Last but not least, the competitive multiplayer that took the online shooter community by storm two years ago is back and better than ever. Though the addictive action remains the same at its core, there are a host of new elements that make it more accessible, more strategic, and more rewarding. This all adds up to a thoroughly excellent package that is sure to thrill shooter fans and deprive them of sleep for months to come.

The campaign picks up where its predecessor left off, and there's a new violent ultranationalist terrorist on the scene. Once again, you play as a few different soldiers who are part of the effort to make the world a safer place. Your missions take you around the world to a number of exotic locations and engage you in a variety of different conflicts, ranging from stealthy and silenced to crowded and cacophonous. The action is smooth and exhilarating, thanks to sharp shooting and movement mechanics that allow you to be as quick and deadly as your skills permit. Environments are well-designed and detailed, though many textures don't look particularly good upon close inspection. Modern Warfare 2 isn't a beautiful game, but it looks great in action. The diverse levels not only provide varied sights, but they are cleverly designed to allow the action to flow at an exciting pace. Opportunities for cover and flanking present themselves naturally, allowing you to move through the battlefield in a variety of fluid ways. The aggressive enemy AI will keep you on your toes, and success is hard-earned and satisfying.

Modern Warfare 2's campaign, like that of its predecessor, is quite short, and you'll likely finish it in about five hours. Though it is disappointing that there isn't more of it, what you do get is a relentless barrage of tight combat and thrilling set pieces. In one early level, you man the turret of a Humvee patrolling the claustrophobic streets of a Middle Eastern city. Enemies seem to be behind every corner, but you are ordered not to fire until fired upon. The tension builds, and once you are engaged by the enemy, all hell breaks loose. After a hectic (and unsuccessful) flight from danger, you end up fighting door-to-door in the streets and ruined buildings. This frantic combat ratchets up when you head to the slums of Rio de Janeiro, and reaches a whole new level when you find yourself engaged in similarly intense firefights on the grassy lawns and paved driveways of suburban America. The fight on the homefront has some very cool moments, but it doesn't mean you're done adventuring abroad. A dramatic prison rescue, a marine infiltration, and a snowmobile chase are just some of the other exhilarating moments that make this campaign so enjoyable.

Though completing the campaign is an intensely satisfying and exciting endeavor, you may not feel very triumphant when all is said and done. Modern Warfare 2 features some dark plot turns, and your missions sometimes have drastic unintended consequences. In one mission in particular, you infiltrate a terrorist cell and are called upon to do the kind of things that terrorists do. What follows is a neutered attempt at portraying the grim reality of terrorism, and concessions are put in place here and elsewhere to keep the plot from getting too dark. Despite these limits, the scene in question is undeniably disturbing and it undermines your sense of having the moral high ground. The game gives you the option to skip this particular level entirely, but the shocking consequences of this grim mission ripple throughout the game, making it difficult to feel like a hero. Subsequent developments further muddle your overall objective, and it doesn't help that many of the subtleties and connecting threads are mumbled during voice-overs between missions. The plot ends up being a bit disorienting, and you may get the feeling that, rather than being the tip of the spear, you are just along for the ride.

Helicopter-mounted miniguns play a big role in one of the more dramatic scenes of the campaign.

If you're looking for some campaign-style action unburdened by any sort of plot, then Special Ops is the place to go. The timed missions are campaign excerpts from Modern Warfare 2 and Call of Duty 4: Modern Warfare that you can play solo or with a friend, either split-screen or online. The missions cover a variety of objectives, which include surviving waves of enemies, moving from point A to point B stealthily (or not), eliminating a certain number of enemies, and racing snowmobiles. You earn a rating based on your completion time or difficulty level and unlock new missions as you progress. Though the missions will adjust to allow you to play solo, Special Ops missions are made to be played cooperatively. Two guns are better than one when clearing out a crowded slum full of enemy combatants, and coordinating a simultaneous sniper attack is much more fun when you are counting down with a buddy. There are also a few missions in which one player uses an airborne vehicle-mounted gun to clear the path for the other player on the ground, and these are frantic and explosively awesome. There is no matchmaking, however, so if you don't have any friends online and need a teammate, you'll have to go fishing in the multiplayer lobbies. As is the nature of cooperative play, missions can fall flat if teammates don't communicate or go off on their own. It can be tough to find a communicative teammate who is willing to let one player take point, but it is certainly worth the effort. When you have a strong team assembled, cooperative play is uniquely fun, and Special Ops provides a great variety of engaging missions.