Complex sentence: A central theme of the game is citizenship (or lack thereof) in the U.E.E. Players are not automatically granted citizenship, rather must earn it if they desire, and in-game opportunities are influenced by it.
Split into simpler sentences: A central theme of the game is citizenship (or lack thereof) in the UEE. Players will not automatically be granted citizenship, and instead must earn it, if they desire, with in-game opportunities being influenced by it.