This addon contains an edited version of one of the intro lines, so it has the HD shotgun sounds for consistency.
Credits: Randy Username for audio editing
The line in quesition: intro5 has the soldier in the intro thanking the scientist for answering his question before loading his shotgun and killing him. In the mod, the line has the LD shotgun sounds, yet the creator has never made a version with the HD sounds, making it inconsistent when playing with HD models enabled. This fixes that.