 The beginning half of the popular video games "Halo 2" and "Halo 3" deals with the defense of Earth against a genocidal alien empire, the Covenant.The protagonist of the game along with Earth's military force, the "UNSC", and a group of former Covenant who rebelled, the Covenant Separatists, eventually repel the invasion and topple the Covenant.The "Mass Effect" franchise features a race of massive semi-organic sentient starships called Reapers who destroy any civilization advanced enough to devise artificial intelligence, based on the perceived inevitability of it rebelling.