Portrait of a Lady

Find a hidden portrait

Good Listener

Take GLaDOS' escape advice

Tater Tote

Carry science forward

Empty Gesture

Drop your co-op partner in goo while they are gesturing by removing the bridge under them

You Saved Science

Complete all test chambers in all courses of co-op

Asking for Trouble

Taunt GLaDOS in front of a camera in each of the five co-op courses

Vertically Unchallenged

Master the Repulsion Gel

Bridge Building

Complete all test chambers in the Hard-Light Surfaces co-op course

Gesticul-8

Perform all 8 gestures of your own volition in co-op

Obstacle Building

Complete all test chambers in the Excursion Funnels co-op course

Can't Touch This

Dance in front of a turret blocked by a hard light bridge in co-op

Rock Portal Scissors

Win 3 co-op games of rock-paper-scissors in a row

Air Show

Perform 2 aerial gestures before touching the ground in co-op

Confidence Building

Complete all test chambers in the Mass and Velocity co-op course

Team Building

Complete all test chambers in the Team Building co-op course

High Five

Celebrate your cooperative calibration success

Stalemate Associate

Press the button!

Scanned Alone

Stand in a defective turret detector

No Hard Feelings

Save a turret from redemption

SaBOTour

Make a break for it

Dual Pit Experiment

Do the same test twice

White Out

Complete the first Conversion Gel test

Stranger Than Friction

Master the Propulsion Gel

Bridge Over Troubling Water

Complete the first Hard Light Bridge test

Preservation of Mass

Break the rules in Test Chamber 07

Drop Box

Place a cube on a button without touching the cube

Undiscouraged

Complete the first Thermal Discouragement Beam test

You Monster

Reunite with GLaDOS

Wake Up Call

Survive the manual override