|Big Bang Theory|
|Description||In Moon, gain sweet, sweet, revenge.|
Big Bang Theory is a secret achievement released in the Rezurrection map pack. It requires the player to gain "sweet, sweet revenge". To get this achievement, the player must finish both parts of Richtofen's Grand Scheme.
This achievement only exists on Xbox 360 and PC, and there is no trophy equivalent of it on PlayStation 3.
- This achievement is named after the theory of the expansion that created the universe, "The Big Bang".