Now That's a Big Fuckin' Gun is an achievement and trophy in the video game Shadows of the DAMNED. It is obtained by using the Skullfest 9000 shotgun to defeat 40 demons in a playthrough. As an achievement, Now That's a Big Fuckin' Gun is worth 15 Gamerscore, while its trophy is bronze.
Now That's a Big Fuckin' Gun is the only Xbox Live achievement with profanity in its title. It was also the only PlayStation Network trophy containing strong language until the Crimewave Edition of PAYDAY 2 released in 2015.