Rocket Turrets

Rocket Turrets are a security robot used against you by GLaDOS in Portal 1 when you attempt to escape.

They look like a mix between a Core and a Turret.

You Wouldn't Know
Video: You Wouldn't Know

A Rocket Turret is shown opening up so that GLaDOS can use it against Chell.

Detach The Wheatley Core
Video: Detach The Wheatley Core

The Fact Core suggests using a Rocket Turret to take down Wheatley.

The Pit Song
Video: The Pit Song

A broken rusty Rocket Turret can be seen behind bars near the end of the video.

Portal Stories: Mel
A broken Rocket Turret can be seen crushed under a concrete slab in the junk yard at the beginning of the chapter "The Ascent".