Production was handled by Teddy Roxpin, Chumzilla, DJ Premier, Marco Polo, Skammadix, Snowgoons, Will C., and Apathy, who also served as executive producer together with Celph Titled and Open Mic.

Jake Paine of HipHopDX gave the album a 3.5 out of 5 saying "If the title was any indication, Killmatic merges two things—seedy subject matter and Golden-Era style.

Swinga of HipHopSite gave the album a 4 out of 5 saying "The who-gives-a-fuck mentality of Killmatic comes through in both its brazen lyrical content and its flagrant sample selection.

The lyrical content is a contest of jabs, designed to shock the listener and instigate friendly competition within the crew".

And that "As hip-hop music continues to deteriorate into something only used to sell bottles (whether it be champagne or soda), it’s nice to see a crew of dudes like Demigodz still holding it down after a decade plus in the game, especially when many of the cats that came up in their era have more or less hung up their mics".