Between all the running and jumping and fighting and crawling and crying and dying and dying and dying, it’s easy to forget about all the work that goes into a game’s design.
UI stands for user interface, a fancy term that means anything the player can touch (keyboard, mouse, controller, etc.) or see (inventory screen, map display, heads up display, or HUD). […]
via The best and worst of user interfaces — Cosmetics and Consoles