Cooperative Testing Initiative

“

These next tests require cooperation. Consequently, they have never been solved by a human. That's where you come in. You don't know pride; you don't know fear. You don't know anything. You'll be perfect. — GLaDOS

”

The Cooperative Testing Initiative, or simply co-op, is a multi-player gamemode and campaign in Portal 2 whereby two players can join up and take part in test courses built specifically for cooperative testing.

Overview

Players take the form of two robot test subjects built by GLaDOS, Atlas; the short and round blue bot, P-body; the tall and pea-shaped orange bot that looks like a turret with arms and legs. Each bot comes equipped with their own Handheld Portal Device with separate portal colors. The portals are capable of maintaining the flow of things, even if it enters a partner's portal, which is essential during some test chambers.

There are five official testing courses, each with a number of test chambers within, which will test both the robots' ability to solve the different puzzles as they progress. Each chamber becomes much harder than the last, with the final test taking place outside the official Aperture testing facilities. In these tests, the bots are then put to the test, so to speak, and must use every bit of knowledge earned about the previous tests in the final one.

For the last chambers of each courses, excluding the fifth, the bots are instructed by GLaDOS to go out and locate a certain disk to be inserted into a DVD player found at the end of the course. Once found and inserted within the device, the players are given a few lines from GLaDOS before she triggers a self-destruct sequence on the duo. This is the only means of retrieving them back to the Hub.

During the testing, GLaDOS will periodically chime in and say a few choice words, either to bemoan the bots' progress or point out their tiny flaws. She even goes beyond to try and break their partnership by pointing fingers at one or the other. If either both or one of the bots' stands within range of GLaDOS' monitoring cameras and perform a gesture, it will elicit her response, depending on the gesture performed.

In this campaign, the bots will be notified that their partner has been destroyed and exactly where it did. The destroyed bot will be easily rebuilt seconds later in a chute from the Reassembly Machine. The gamemode gives an infinite amount of lives, and GLaDOS will comment on every death that occurs with dry humor or irritability. As the bots progress, they will cross checkpoints that lead into the next part of the test chamber. Checkpoints allow the bot that died to respawn at the checkpoint for shorter travel time to the next testing chamber.

Courses

Main article: Portal 2 courses

Portal 2 courses

Additional Courses

Art Therapy

Set after the conclusion of the Mobility Gels course, GLaDOS has reassembled the bots for testing again and claims that it has been 100,000 years since they were last reassembled. As the testing progresses, the bots are able to observe the defunct surroundings of the Enrichment Center, which GLaDOS assures them as part of an "art exhibit". Further on in the course, players will be sent to a Robot Assembly Annex station to repair their own reassembly machines as GLaDOS finally makes it clear that it has only been a week since the Mobility Gels course and that she needs their help in restoring her control over the facility as something is overriding her controls. At the end of the course, both players are sent out of the testing area to resolve the problem in a control room housing a prototype chassis of the central core. While the first 8 test chambers take place in the "Remaster" clinical look, the last chamber takes place in the 50-80's era Aperture

Interestingly, the sixth course was initially going to consist of advanced test chambers during Portal 2's development, months before the game was released. However, this was scrapped and was removed from the final game. The Peer Review DLC to Portal 2 instead adds only challenge modes to single-player and co-op, with no sign of advanced test chambers. The Art Therapy course is referred to as an additional course instead of the "sixth course".

Non-Emotional Manipulation

All owners of the Sixense MotionPack DLC receive this course for free. It makes use of the new Portal Surfing and One-to-One mechanics.

Gallery

Atlas in the Roll Cage. P-body is located behind Atlas's frying pan, also in a roll cage   The bots in a Aperture Science blueprint format

Related Achievements

Portal 2

You Saved Science Complete all test chambers in all courses of co-op Team Building Complete all test chambers in the Team Building co-op course Triple Crown Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each Still Alive Complete Course 4 with neither you nor your co-op partner dying Rock Portal Scissors Win 3 co-op games of rock-paper-scissors in a row Professor Portal After completing co-op, complete Calibration Course online with a friend who hasn’t played before Portal Conservation Society Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements Party of Three Find the hidden companion cube in co-op test chamber Obstacle Building Complete all test chambers in the Excursion Funnels co-op course Narbacular Drop Place a portal under your co-op partner while they are gesturing Iron Grip Never lose a cube in Chamber 6 of the Mass and Velocity co-op course

High Five Celebrate your cooperative calibration success Gesticul-8 Perform all 8 gestures of your own volition in co-op Friends List With Benefits While playing co-op, hug 3 different people on your friends list Four Ring Circus Enter 4 different portals without touching the ground in co-op Empty Gesture Drop your co-op partner in goo while they are gesturing by removing the bridge under them Confidence Building Complete all test chambers in the Mass and Velocity co-op course Can't Touch This Dance in front of a turret blocked by a hard light bridge in co-op Bridge Building Complete all test chambers in the Hard-Light Surfaces co-op course Asking for Trouble Taunt GLaDOS in front of a camera in each of the five co-op courses Air Show Perform 2 aerial gestures before touching the ground in co-op Talent Show Never lose a cube in Chamber 6 of the Mobility Gels co-op course

See also

• Chell
• Perpetual Testing Initiative