Most electronic games currently use visual output as the primary means of transmitting game information to the user. The form taken by visual output can vary, but typically comes through a CRT or LCD monitor screen. Games past and present have played with using multiple screens, holographic displays, illuminating input devices and other forms of visual output.
Most games present the player with some sort of view of the games world and the entities within that world. Many games also provide some kind of head-up display to convey information that is important to the user but would not be apparent simply from the players view of the game world, like a radar screen, health display, or the like.