Battlefield 4 is a developed by and published by . It is a sequel to 2011's and was released in October 2013.Battlefield 4 was met with positive reception. It was praised for its multiplayer mode, gameplay and graphics, but was also criticized for its short and shallow campaign mode, and for its numerous and . It was a commercial success, selling over 7 million copies.The game's (HUD) is 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 top right displays kill notifications of all players in-game. On the Windows version of the game, the top left features a chat window when in multiplayer. 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. Battlefield 4 options also allow colour-blind players to change the on-screen colour indicators to: tritanomaly, deuteranomaly and protanomaly.