Battlefield 4 features several changes compared to its predecessor. The game's heads-up display is much the same, composed of two compact rectangles. The lower left-hand corner features a mini-map and compass for navigation, and a simplified objective notice above it; the lower right includes a compact ammo counter and health meter. The mini-map, as well as the main game screen, shows symbols marking three kinds of entities: blue for allies, green for squadmates, and red/orange for enemies.[9][10][11]
Players can now use dual-scoped weapons, including weapons with different firing modes (e.g. single shots, automatic fire). They can now "spot" targets—marking their positions to the player's squad— in the single player campaign (a first in the Battlefield franchise) in addition to multiplayer, allowing teammates to either suppress or eliminate them. In addition, players will have more survival capabilities, such as countering melee attacks from the front while standing or crouching, shooting with their sidearm while swimming, and diving underwater to avoid enemy detection. The single-player campaign will see the player using vehicles to quickly traverse mini-sandbox-style levels.[9][10]
Multiplayer
On June 10, 2013, at E3, DICE featured the map "Siege of Shanghai", pitting the People's Liberation Army against the U.S. Marine Corps. The gameplay showcased Commander Mode; new weapons and vehicles; and the "Levolution" gameplay mechanic. The video displays the last of these at various points, including: a player destroying a support pillar to trap an enemy tank above it; and a large skyscraper (with an in-game objective on the top floor) collapsing in the center of the map, kicking up a massive dust cloud throughout the map and bringing the objective closer to ground level.[11][14] Levolution also includes effects such as shooting a fire extinguisher to fill the room with smoke, car alarms going off when jumped over, metal detectors ringing when a player passes through them or cutting the power cord in a room to darken it.[15]
In a blog post by DICE it has been revealed that the four kits from Battlefield 3 will be returning with new enhancements and abilities. The Assault kit now has a limited number of revives and must wait for his defibrillator to recharge before reviving another player. The Engineer kit now uses PDWs, as carbines are now available to all kits. The Support kit maintains the ability to place C4 and Claymores, in addition the kit has access to the new remote mortar and the XM25 allowing for indirect suppressive fire. The Recon kit is now far more mobile and is able to equip carbines and C4. Sniping mechanics are also enhanced with the ability to zero in your sights (set an aiming distance), and equip more optics and accessories than previous Battlefield games. The Recon kit is still able to utilize the MAV, T-UGS, and the Radio Beacon.[16][17][18][19]
New vehicles have also been introduced. With the addition of the Chinese faction, new vehicles include the Type 99 MBT, the ZFB-05 Armored Car, and the Z-10W Attack Helicopter. Jets have also been rebalanced and put into two classes, "Attack" and "Stealth". The Attack jets focus is mainly air to ground capabilities, while the Stealth jets focusing mainly on air to air combat.
Customization has also been heavily improved in Battlefield 4, with all new camos available for every gun. A new "adaptive" camo is also being introduced that can adapt the camo to the map being played without the player having to change camos every game. Camos can now be applied to Jets, Helicopters, and Tanks.
Plot
Battlefield 4's single-player campaign takes place in 2020, six years after its predecessor. The player controls Sgt. Daniel Recker, a member of a US special operations squad callsigned "Tombstone".[20] His teammates include squad leader SSgt. Dunn, second-in-command SSgt. Kimble "Irish" Graves, and Marine Combat Lifesaver Clayton "Pac" Pakowski.[9][21] Later in the Campaign, a CIA field operative named Laszlo W. Kovic joins Tombstone.[21] The player will also meet Huang "Hanna" Shuyi, a female American soldier of Chinese descent.[22]The Battlefield 4 gameplay reveal trailer features footage from the prologue mission "Fishing in Baku", where Tombstone Squad, carrying intelligence from a defecting Russian general, escapes from Baku, Azerbaijan with Russian special forces in hot pursuit.[9][10] Afterwards, Tombstone squad is sent on a covert mission to Shanghai, to rescue a group of VIP´s, Kovic among them.[10] Another revealed mission, "Angry Sea" (怒海狂涛 Nù hǎi kuángtāo), shows Recker, Irish, Pac, and Kovic trying to escape from a sinking aircraft carrier en route to Singapore with more intel, while fighting off Chinese forces.[23][24] The campaign's main plot involves American implication in the assassination of China's future leader and "voice of peace", Jin Jié, and the threat of a third world war between the United States, China, and Russia.[25][21]
Development
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Battlefield 4 is built and developed upon the new Frostbite 3 engine. This is the first game to be developed on the engine which is built upon the Frostbite 2 engine introduced with Battlefield 3. The new engine enables more realistic environments with higher resolution textures and water particle effects that show up splashed on the screen when the player is in the water. A new "networked water" system is also being introduced, allowing all players in the game to see the same wave at the same time. Tessellation has also been overhauled. The game will also run at 60fps on the Playstation 4 and Xbox One, while maintaining the current 30fps on the Playstation 3 and Xbox 360. An Alpha Trial commenced on June 17, 2013 with invitations randomly emailed to Battlefield 3 players the day prior. The trial ran for two weeks and featured the Siege of Shanghai map with all of its textures removed, essentially making it a "whitebox" test.
Due to mixed reception of the two-player Co-op Mode in Battlefield 3, DICE decided to omit the mode from Battlefield 4 to focus on improving both the campaign and multiplayer components instead.[3][10]