The developers look at several episodes of Sesamstraße (1969) for inspiration of what the talking guns would look like.
The Bounty Hunter is tasked to kill the Skrendel Brothers. They are named Angela, Mona, and Johnathan. This is also the name of three of the main cast members of Wer ist hier der Boss? (1984).
The Movie Spookies can be watched at the beginning of the DLC.