These Turrets appear to be as fully functional as regular Sentry Turrets and possess the innocent and feminine voice tones as they should. In the game's co-op campaign, the Defective Turrets appear as obstacles for Atlas and P-body throughout the Mobility Gels testing course. They are first encountered in Chapter 5, The Escape. Their voice lines seem to imply they are blind, but they are still aware of Chell's presence. They are harmless to Chell, many times making comments such as 'If anyone asks, I killed you'. Unlike normal Sentry Turrets, Defective Turrets have a more humorous and sarcastic dialogue, and speak in a masculine, less robotic voice with a Texas-like accent. In addition, Turrets appear to be unable to see through Hard Light Bridges or Excursion Funnels.ĭefective Turrets, referred to as 'Crap Turrets' by Wheatley, are incomplete, wrongly assembled and ammo-less versions of the Sentry Turrets introduced in Portal 2. In Portal 2, however, Turrets will only follow the player behind glass with their beam and will not shoot through portals, opening fire almost immediately when the player moves out of the glass or through the portal. In Portal, Turrets will shoot at bulletproof glass and through portals when the player is on the other side. When thrown into an Emancipation Grill they will say 'ow' repeatedly. Additionally, the Discouragement Beams or Emancipation Grills can be used to completely destroy them. This can be done by picking them up and dropping them, or using any object to tip them over. The most common method is knocking them over, causing them to flail and fire wildly before deactivating. Turrets can be avoided, disabled or destroyed in a number of ways. If the latter occurs, Turrets will briefly search for the test subject (as indicated by the movement of the targeting laser), after which they will revert to a standby state. They will continue to fire until the target is dead or moves out of sight. Moving into their angle of sight however, will cause Turrets to deploy their guns shortly after greeting the unlucky individual before opening fire. When test subjects are out of sight from the Turret's presence, they will maintain a standby state and will remain motionless with their guns retracted. To quote Cave Johnson, 'that's 65% more bullet per bullet.' According to the Portal 2 Turrets trailer, the turrets use spring mechanisms to accelerate the entire cartridge, including the casing, without igniting the propellant, which may explain how the player can survive getting shot by the Turret so many times. Almost all of the space within the Turret is devoted to storing the ridiculously stacked ammo, explaining the nearly infinite supply of ammo when firing. The central part of the chassis holds their red eye, which emits a targeting laser. They are seen as incapable of independent movement, but can open each side of their chassis (their 'arms') horizontally in order to reveal twin double-barreled machine guns. Sentry Turrets are tripod robots that appear in every game in the Portal series.

Portal turret series 3