Calibration Course

mp_coop_start.bsp^{[citation needed]}
mp_coop_lobby_3.bsp

This is the first level in Cooperative Testing Initiative of Portal 2. Its purpose is to teach player the basics of Cooperative testing, like the Ping Tool, thinking with four portals, etc.

Hazards

#	Atlas	P-body
1	Wave to each other.
2	Ping your favourite animal (choices: horse, deer, rooster, elephant, wolf, moose, baboon, porcupine, rhinoceros).
3		Ping your favourite Periodic element (choices: copper, zinc, gallium, silver, cadmium, indium, gold, mercury, thallium).
4	Use the Ping tool to place portals with the help of GLaDOS, then take a Handheld Portal Devices.
5	Place portals to reach the higher ledge.
6	Stand on the button so that P-Body can proceed.
7		Stand on the button so that Atlas can proceed.
8		Use the portals so that Atlas can proceed.
9	Use cubes to open a passage for each other.
10	Activate the dropper.
11		Place the cube on the button.
12	Pass the cube back to P-Body.	Stand on the button.
13	Shoot portals.
14		Pass through the portals, press a Pedestal Button to activate platforms leading to exit.