At one point, Recker will briefly lose the tactical visor, forcing them to only use the Engage command to direct his squadmates on a limited number of enemies. By identifying enemies, the player can make them visible without using the visor, making them easier to mark for their teammates. The tactical binocular is similar to a laser-designator, in the sense that it allows the player to identify friendly and enemy units, weapon stashes, explosives, and objectives in the field. The Engage command directs Recker's squadmates, and occasionally other friendly units, to attack any hostiles in Recker's line of sight. As the player character, Recker, the player can use two campaign-only functions: the Engage command and the tactical binocular. For the most part, the player must traverse mini-sandbox-style levels, in some cases using vehicles, like tanks and boats, to traverse the environment. The single-player campaign has several differences from the main multiplayer component. Standard combat abilities are still current including, reloading whilst sprinting, unlimited sprint, prone and vaulting. In addition, players have more combat 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 game's bullet-dropping-system has been significantly enhanced, forcing the player to change the way they play medium to long distance combat. They can 'spot' targets (marking their positions to the player's team) in the single-player campaign (a first in the Battlefield franchise) as well as in multiplayer. semi-automatic, automatic fire), allowing the player to adapt to the environment they find themselves in. Most weapons also have a default setting for different firing modes (e.g. Primary, secondary and melee weapons can all be customised with weapon attachments and camouflage 'skins'. Weapon customisation is expansive and encouraged. Battlefield 4 options also allow colour-blind players to change the on-screen colour indicators to: tritanomaly, deuteranomaly and protanomaly. The mini-map, as well as the main game screen, shows symbols denoting three kinds of entities: blue for allies, green for squadmates, and orange for enemies, this applies to all interactivity on the battlefield. On the Windows version of the game, the top left features a chat window when in multiplayer. The top right displays kill notifications of all players in-game.

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 game's heads-up display (HUD) is composed of two compact rectangles.

3.1 Technical issues and legal troubles.

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