BTD BTD — A projectile discharged from a firearm traverses through the air, contending with the influences of both air resistance and gravity. These factors, varying with the specific warhead employed, impart distinct trajectories upon the bullet. Upon impact, the projectile may either penetrate or ricochet, influenced by the properties of the struck material, including thickness, angle, bullet speed, and warhead type. When assessing the damage incurred by a character upon being hit, the inflicted harm undergoes nuanced alterations. The specific body part struck, the depth of the impact, penetration width, bullet speed, armored state, and other variables contribute to the calculation of negative effects. Both player and non-player character (NPC), endowed with equal autonomy, operate under artificial intelligence AI.