File:Q4.png In Quake 4, there are three types of Turrets: ceiling-based, static, and ground-based. Ceiling turrets are mounted onto ceilings and will attack if an alarm is tripped. Ground turrets are dropped by stealth air units onto the ground, mainly as anti-vehicle weapons. Static turrets are mounted on various buildings. If a Turret is damaged, a red globe will surround it. Ceiling turrets fire nails, making a very loud sound when they do so. Static turrets fire rapid, inaccurate bursts of machine gun fire. Missile turrets will fire a heat-seeking missile.