The game is an imitation of the work sniper. As the game need to perform various tasks to destroy stationary and moving targets. For production accurate long range shot needed corrected trajectory of the bullet. This is corrections, caused by range, wind, pre-emption according to the ballistic weapon table. On the difficult level of the game - this corrections, caused by atmospheric parameters.
The trajectory of the bullet depends on:
  - Characteristics of the weapons (twist, accuracy, caliber);
  - Characteristics of a bullet (initial velocity, mass, drag function, ballistic coefficient);
- Atmospheric parameters (temperature, humidity, pressure);
- The angle of the target.
All this is done in the game.