Star Citizen is a complex space simulation game with strong sandbox MMO elements. Star Citizen will consist of two main components: first person space combat and trading in a massively multiplayer persistent universe and customizable private servers, and a branching single-player and drop-in co-operative multiplayer campaign (known as Squadron 42).
Both Star Citizen and Squadron 42 are set in a 30th-century Milky Way centered around the fictional UEE (United Empire of Earth), an analogue of the late Roman Empire. A central theme of the game is citizenship (or lack thereof) in the UEE, which must be earned through player actions (such as completing a period of military service). Citizens will enjoy certain in-game benefits, for example paying a reduced tax rate or having easier access to inter-species trade.
A strong focus will be placed on player interaction, with player behavior influencing and being influenced by a dynamic economy system.