- The idea for the Graal shotgun came from lead gameplay designer Corey Gaspur's nightmare about a crazy man chasing him with a nail gun.
- The Graal is one of the very few weapons that shoot rendered projectiles instead of tracers. Firing it into a wall results in a tight cluster of flechettes sticking out of the surface for several seconds. If the shot was charged beforehand, the flechettes will glow like hot metal, then quickly cool down to a black coloration.
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