Assault on Precinct 13 was a project for Wolfenstein 3D, made by MrWolf. In progress circa 2003, the mod was based on the 1976 movie of the same name, directed by John Carpenter who had also influenced MrWolf's Core of Darkness.
The mod was made solely for fun, though it features a handful of new graphics, mainly lobby-type textures, marble slabs, grey brick textures and so on. Objects were also added anticipating that the mod might should have had contained 3D directional sprites at one point.
A 1-level playthrough was uploaded by Atina on her YouTube channel in 2014, and it was in this fashion that the mod entered most people's conscience.