Call of Duty Black Ops Zombie Theme (From "Call of Duty Black Ops") [Heavy Metal] is a very emotional song by Charlie Parra del Riego with a tempo of 101 BPM. It can also be used half-time at 51 BPM or double-time at 202 BPM. The track runs 3 minutes and 37 seconds long with a F&o/G&m key and a minor mode.

The movie was inspired by and serves as an homage to Italian cannibal films of the late 1970s and early '80s "cannibal boom", particularly Cannibal Holocaust (1980), which features a film-within-a-film titled The Green Inferno.

The Forest was inspired by cult films such as The Descent and Cannibal Holocaust and video games like Don't Starve, and was accepted as part of Steam Greenlight in 2013.