Plot

The game begins in October 1944, as a group of US commandos infiltrate an Imperial Japanese Navy-controlled island in the Sea of Japan as part of "Operation Aurora." They secure a Japanese scientist who was working on a secret scalar weapon, and escape the island on a submarine. However, as foreshadowed by the scientist's warnings, the commandos witness the weapon firing and subsequently perish from the resulting tsunami, sparking a myth within the U.S. Army.

In the present day, Privates Preston Marlowe, Terrence Sweetwater, George Haggard and Sergeant Samuel Redford are fighting in Russia in an attempt to secure a scalar weapon device. Despite evading Russian soldiers and completing the mission successfully, the device is discovered to be a fake. Impressed with their previous activities, Army General Braidwood has the squad transferred into the Special Activities Division and assigns them a new mission; to contact Agent James Wyatt (called Aguirre in-game), much to the disappointment of Redford, who had hoped to retire after the previous mission.

The squad travels to Bolivia in search of the agent, and after many firefights, they eventually save Aguire. He sends them to retrieve his scalar technology intelligence from a French weather satellite that can be controlled from a base in the Andes. Sweetwater lands the satellite and the squad successfully defeat a Russian attempt to destroy it. Marlowe locates the data server and proceeds to descend the mountain during a blizzard while dodging Russian patrols. He survives, and is extracted by the others.

During extraction, Aguire briefs the squad about the man responsible for rebuilding scalar weaponry; Arkady Kirilenko, a Russian Army colonel the squad encountered in Russia. Kirilenko is hoping to use scalar weaponry to disable America's power grid and pave the way for a Russian invasion. He is believed to be hiding in Chile. The squad head there, aided by US forces, and find Kirilenko, who escapes again. Left with only Kirilenko's papers, Sweetwater discovers there is a shipping manifest for an abandoned ship called theSangre Del Toro. Aided by the rest of the squad, Marlowe finds the ship and retrieves a compound essential to the use of the weapon, while also discovering the truth behind Operation Aurora - the US military knew it was a suicide mission, and the operation was planned in order to learn more about the weapon's capabilities.

While attempting to meet Aguire in Ecuador, the squad's helicopter is shot down and they are separated. Along with their helicopter pilot, Flynn (Eric Loren), they regroup and escape the local militia. Redford gives Aguire the compound before finding out that Aguire has double-crossed them by allying himself with Kirilenko. Aguire reveals that he wants revenge against the United States for what happened to his father, Thomas Wyatt (one of the commandos killed in 1944 during Operation Aurora). Despite this, Kirilenko betrays Aguire and kills him. Before he can kill the squad, however, Flynn intervenes and saves them at the cost of his own life.

While the squad is mourning Flynn, they hear Kirilenko talking through a guard's radio. Marlowe knifes the guard and the squad proceeds toward the city of Quito. Here, after battling squads of South American and Russian troops, they find a large cargo aircraft that is believed to house the scalar weapon. This is confirmed as a powerfulelectromagnetic pulse is suddenly released, disabling all electronic equipment in the city except the aircraft. Haggard and Sweetwater become disheartened, with Haggard going so far as suggesting the squad abort the mission. Angry at his allies for giving up, Marlowe is about to continue the mission alone before Redford stops him and then convinces the rest to continue. They then infiltrate the aircraft as it takes off. After a firefight to reach the cockpit, they find it empty. They return to the cargo bay to find Kirilenko attempting to fire the scalar weapon again, this time high over the southern United States. With the help of explosives from the plane's armory, they access and destroy the scalar weapon.

The explosion sends the aircraft plummeting, forcing the squad to bail out, but Kirilenko grabs the last parachute before Marlowe. In free fall, Marlowe kills Kirilenko, and is then saved by Sweetwater who hands Marlowe the parachute that was stolen by Kirilenko. The squad lands in Texas, Haggard's home state. Shortly after, General Braidwood arrives to inform them that they are to aid the US Army against an incoming Russian invasion that recently passed through Alaska and Canada, much to the squad's disappointment.

 

Multiplayer

 

Screenshot of Battlefield: Bad Company 2's multiplayer mode. The player is armed with an M249 light machine gun.

Multiplayer is class-based, with four classes: Assault, Engineer, Medic, and Recon. Each class has a variety of unique weapons and equipment, and serves a specific role in combat. There are also some weapons that can be used by any class, such as pistols andshotguns. Each class gains experience and levels up separately.

New items are unlocked by earning experience points, which are gained for performing actions conducive to the goals of the player's team, such as eliminating enemy players, healing team mates, or capturing or defending points of interest. These points count towards a total of 50 ranks. Bonuses to the base number of points can be awarded under certain circumstances (such as eliminating an enemy by means of a headshot).

Multiplayer mode features 15 vehicles, including new additions, such as the Sikorsky UH-60 Black Hawk, a quad bike, a four-man patrol boat, a personal watercraft, a ZU-23-2 mounted on a BMD-3 armoured personnel carrier, and a Northrop Grumman MQ-8 Fire Scout, controlled via remote computer terminals. The available maps are set in various environments such as South America and Alaska, near the borders of Russia, similar to those seen in the single-player.

A dog tag system, as seen in Battlefield 2142 and Battlefield: Bad Company, is also used, awarding players with their opponents' dog tags when they defeat them with a knife attack.Players can use party chat for each game mode.[15] The game uses the PunkBuster anti-cheat program to protect from cheaters in online multiplayer matches.

Bad Company 2 features several game types:

Rush: Players must defend or destroy pairs of M-COM stations until either the attackers run out of respawn tickets or all of the stations are destroyed. Lost tickets can be regained by reviving fallen team mates. An M-COM station can be destroyed by planting a charge, using explosive weapons or ballistics, or simply by demolishing the building in which it is located. However, not all M-COM stations exist in destructible buildings, forcing players to use a variety of methods to achieve the same goal. When a charge is planted by the attacking team, an alarm is activated and the defenders have a limited amount of time to get to the M-COM station and disarm the bomb before it detonates.

Squad Rush: Similar to Rush, but consists of only two squads, one defending and the other attacking. The maps used for Squad Rush are smaller versions of those for both Conquest and Rush modes. There are only 2 M-COM stations in each round.

Conquest: Features the classic gameplay of the Battlefield series. Players must capture and defend flags for as long as possible. If a base is taken, it can be recaptured, and the cycle can repeat until the game's end. Every kill depletes one ticket, and tickets gradually decrease when one team controls more than half of the flags on the map. Vehicles can spawn once a flag is captured. When one team's tickets are depleted, that team will lose the game. Lost tickets can be regained by reviving fallen team mates.

Squad Deathmatch: Features up to four squads, each fighting against the other. An infantry support vehicle is available for any squad to claim, giving a significant advantage. The first squad to score fifty kills wins the match.

Onslaught: Tasks one squad of up to four players to capture certain points on the map, allowing the squad to advance. The game is won by capturing all the points. Unlike other modes, the only enemies are bots. This game mode features new lighting and time of day on existing maps, as well as new vehicles. It is available for Xbox 360 and PS3 only; a PC version was planned, but was cancelled.

(From Wikipedia)