Co-op Test Shaft

{{Portal Cleanup}}
{{Location Infobox
|image =
|image2 =
|name = Co-op Test Shaft
|constructed =
|destroyed =
|location = Enrichment Shafts
|builder =
|era = ''Portal 2''
|affiliation = Aperture Science
|maps = 
* mp_coop_paint_come_along
* mp_coop_paint_redirect
* mp_coop_paint_bridge
* mp_coop_paint_walljumps
* mp_coop_paint_speed_fling
* mp_coop_paint_red_racer
* mp_coop_paint_speed_catch
* mp_coop_paint_longjump_intro

|designer =
|hidei =
|hideu =
|hideg =

This unnamed '''Co-op Test Shaft''' featured in the cooperative campaign of ''Portal 2'' is one of the nine Enrichment Shafts from the salt mines owned by Aperture Science|Aperture Science Innovators, found underneath the computer-aided Aperture Science Enrichment Center|Enrichment Center.

This test shaft had originally ran through cooperative testing during the vintage era, but was later utilized by GLaDOS after she gains more sight of the facility with previous help of ATLAS and P-body. It is featured within ''Portal 2 storyline Gels|Test Course 5 Mobility Gels''.

== Overview ==

* After GLaDOS gains complete sight over the Aperture Science Enrichment Center|Enrichment Center, she discovers that there are hundreds if not thousands of Test Subject|human subjects kept in cryogenic stasis within a locked Aperture Science Extended Relaxation Annex|Extended Relaxation Annex, located just past this shaft. Unable to unlock the vault, she sends ATLAS and P-body to achieve her objective.

* Like Test Shaft 09, this shaft was designed to test Mobility Gels but with two test subjects testing together, but only the Repulsion Gel|Repulsion and Propulsion Gel|Propulsion Gels. However according to GLaDOS this did not work, as humans "treat their friends as enemies", hence attempting to complete these tests with ATLAS and P-body.

* Given the presence of the Propulsion Gel, the shaft was built sometime in the 70s and was later tempered and adjusted to the modern Aperture testing elements by GLaDOS.

* The shaft is connected to the Hub through elevators, and to the Extended Relaxation Annex through a gargantuan hatch. As seen in Test Shaft 09, it is also connected to the other Enrichment Shafts through an underground train network.

* While Chell had only ventured throughout Test Shaft 09, ATLAS and P-body were sent possibly further through the salt mines under orders from GLaDOS to recover stored human Test Subjects in the Extended Relaxation Annex.

== Layout ==
The shaft is made of 11 Enrichment Spheres. 

=== Enrichment Sphere 01 ===
The first test involves the use of the Repulsion Gel to jump on Aperture Science Unstationary Scaffold|Unstationary Scaffolds.

=== Enrichment Sphere 02 ===
Includes an Excursion Funnel combined with the Repulsion Gel in order to reach a distant platform.

=== Enrichment Sphere 03 ===
Contains two test chambers, both including a Hard Light Bridge as a surface for placing the Gel.

=== Enrichment Sphere 04 ===
Introduced the two-walls technique to jump on with the Gel, eventually a Hard Light Bridge being later the second wall.

=== Enrichment Sphere 05 ===
This is the first sphere where the use of the Repulsion Gel is alternated to the Propulsion Gel to catch cubes, also in combination with Aperture Science Crusher|Crushers.

=== Enrichment Sphere 06 ===
Involves also Aperture Science Sentry Turret|Turrets and a Weighted Pivot Cube and contains an Aperture Science Material Emancipation Grill|Emancipation Grill as a testing element.

=== Enrichment Sphere 07 ===
This second to last sphere includes time restriction to pick up the cube through the Propulsion Gel.

=== Enrichment Sphere 08 ===
The final sphere mixes the previous testing elements to approach to the Human Vault, but cuts off the Hard Light Bridge.

=== Enrichment Sphere 09 ===
This sphere is empty and out of ATLAS and P-body's reach.
=== Enrichment Sphere 10 ===
=== Enrichment Sphere 11 ===

== Behind the scenes ==
* The Enrichment Shafts are what remains of the game ''F-STOP'', which originally was to be a prequel to ''Portal'' set during Cave Johnson's era, hence the old-fashioned design of the areas. It was not to feature Teleportation|portals, and Johnson was to be a protagonist later turning antagonist, a role adapted for Wheatley in the final game.''The Final Hours of Portal 2''

== Trivia ==
* The shaft appears to start from the top, while the others from the bottom, but it simply could have been reworked by GLaDOS to make ATLAS and P-body enter the Vault.

== Gallery ==
=== Screenshots ===

=== Logos, signs and posters ===

FileUnderground exit 01a.png|
FileUnderground exit 01b.png|
FilePopart70s 01.png|
FilePopart70s 02.png|
FileThis way up.png|
FileTestchamber mark.png|
FileTransition Seal 02 mp.png|

== List of appearances ==
*''Portal 2'' {{C|–°ooperative campaign only}} {{1st}}

== References ==

|title=''Portal 2'' co-op journey
|before=Turret Manufacturing
|after=Aperture Science Extended Relaxation Annex

CategoryAperture Science locations
CategoryPortal 2
CategoryEnrichment Shafts