Bromageddon

Bromageddon is an achievement in Halo 4. It is awarded for completing the entire Campaign co-operatively on Heroic or harder. The achievement is worth 40 Gamerpoints. It is represented by two fists and a five-pointed star inside a nine-pointed star.

Trivia

 * The achievement name is a play on the words "Brother" and "Armageddon".