Physical Damage Types
Physical Damage Types are a common mechanic seen in gaming where, as the name suggests, attacks attacks of different physical natures inflict different kinds of damage. This actually has its basis in real life; as anyone who's studied medicine even casually can tell you, different kinds of physical trauma affect the body in different ways - hitting someone with a rock damages them in different ways to stabbing them with a pointy stick or ripping them with claws. Not all games use the system, but because it adds a bit more tactics to the issue of basic combat, it's common enough.
Dungeons & Dragons is a particularly good example, traditionally dividing physical damage into Bludgeoning, Piercing and Slashing - Dungeons & Dragons 4th Edition is the only exception to this.
Weirdly, giving guns their own physical damage type is very rarely seen in gaming of any kind.