Models projectile physics by allowing them to bounce off and penetrate certain materials as well as drop due to gravity, possibly including effects of wind and others.
Alternate names: Projectile physics, Bullet physics, Bullet drop
The first video game about Ballistics was released in 1983.
* Gravity affects projectiles - bullets/arrows drop with distance rather than flying in a straight line unaffected by gravity
* Drag or air resistance - projectile speed drops with distance traveled, may affect only effective range of the weapon but may involve reduced damage/penetration properties
* Wind shear - wind blows projectiles off course
Common in tactical shooters, some others also use it to improve realism.
For strategy games this can be assumed to indicate the game simulates the flightpath of the projectiles rather than doing hitscanning (and does this to see if the projectile actually hits, not just for the graphics).