Turrets

"Hello, friend."

- Sentry Turret "I don't hate you."

- Sentry Turret "This next test involves turrets. You remember them, right? They're the pale, spherical things that are full of bullets. Oh wait, that's you in five seconds. Good luck."

- GLaDOS to Chell.

Turrets are antagonists from the Portal franchise. They are robotic gunners that attempt to kill the player. There are several types of Turrets, each with different abilities and personalities.