A bullet is a projectile that is propelled by a firearm igniting a small charge of gunpowder and primer in the shell casing to which it is attached. They travel at extremely high speeds and cause damage to targets through a combination of tissue disruption and kinetic force at impact. Bullets are round in shape and are usually pointed to streamline the projectile and give it more penetrative power.
Bullets can be found in many games as ammunition for various firearms, sometimes in different calibers and ammunition types. Most firearms hold multiple bullets in a "magazine" or "clip" that attaches to the gun itself.