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51 of 51 (100%) Achievements Earned::

Personal Achievements
 

Wake Up Call

Survive the manual override
Unlocked 25 Dec, 2016 @ 8:01am

You Monster

Reunite with GLaDOS
Unlocked 25 Dec, 2016 @ 8:17am

Undiscouraged

Complete the first Thermal Discouragement Beam test
Unlocked 25 Dec, 2016 @ 8:23am

Bridge Over Troubling Water

Complete the first Hard Light Bridge test
Unlocked 25 Dec, 2016 @ 9:06am

SaBOTour

Make a break for it
Unlocked 26 Dec, 2016 @ 2:57am

Stalemate Associate

Press the button!
Unlocked 26 Dec, 2016 @ 3:25am

Tater Tote

Carry science forward
Unlocked 31 Dec, 2016 @ 4:14am

Vertically Unchallenged

Master the Repulsion Gel
Unlocked 31 Dec, 2016 @ 3:38am

Stranger Than Friction

Master the Propulsion Gel
Unlocked 31 Dec, 2016 @ 4:34am

White Out

Complete the first Conversion Gel test
Unlocked 31 Dec, 2016 @ 4:57am

Tunnel of Funnel

Master the Excursion Funnel
Unlocked 22 Dec, 2018 @ 1:06pm

Dual Pit Experiment

Do the same test twice
Unlocked 30 Jan, 2018 @ 2:49am

The Part Where He Kills You

This is that part
Unlocked 8 Dec, 2020 @ 8:51am

Lunacy

That just happened
Unlocked 8 Dec, 2020 @ 9:21am

Drop Box

Place a cube on a button without touching the cube
Unlocked 26 Dec, 2020 @ 1:34pm

Overclocker

Complete Test Chamber 10 in 70 seconds
Unlocked 29 Dec, 2020 @ 5:38am

Pit Boss

Show that pit who's boss
Unlocked 29 Dec, 2020 @ 5:52am

Preservation of Mass

Break the rules in Test Chamber 07
Unlocked 28 Dec, 2020 @ 9:43am

Pturretdactyl

Use an Aerial Faith Plate to launch a turret
Unlocked 26 Dec, 2020 @ 1:39pm

Final Transmission

Find the hidden signal in one of the Rat Man's dens
Unlocked 28 Dec, 2020 @ 9:39am

Good Listener

Take GLaDOS' escape advice
Unlocked 26 Dec, 2016 @ 2:57am

Scanned Alone

Stand in a defective turret detector
Unlocked 26 Dec, 2016 @ 3:11am

No Hard Feelings

Save a turret from redemption
Unlocked 29 Dec, 2020 @ 5:47am

Schrodinger's Catch

Catch a blue-painted box before it touches the ground
Unlocked 26 Dec, 2020 @ 2:53pm

Ship Overboard

Discover the missing experiment
Unlocked 26 Dec, 2020 @ 2:59pm

Door Prize

Examine all the vitrified test chamber doors
Unlocked 26 Dec, 2020 @ 2:58pm

Portrait of a Lady

Find a hidden portrait
Unlocked 26 Dec, 2020 @ 3:15pm

You Made Your Point

Refuse to solve the first test in Chapter 8
Unlocked 26 Dec, 2020 @ 3:21pm

Smash TV

Break 11 test chamber monitors
Unlocked 26 Dec, 2020 @ 4:09pm

High Five

Celebrate your cooperative calibration success
Unlocked 27 Dec, 2016 @ 8:52am

Team Building

Complete all test chambers in the Team Building co-op course
Unlocked 27 Dec, 2016 @ 9:20am

Confidence Building

Complete all test chambers in the Mass and Velocity co-op course
Unlocked 28 Dec, 2016 @ 9:36am

Bridge Building

Complete all test chambers in the Hard-Light Surfaces co-op course
Unlocked 29 Dec, 2016 @ 3:40am

Obstacle Building

Complete all test chambers in the Excursion Funnels co-op course
Unlocked 25 Dec, 2020 @ 3:26pm

You Saved Science

Complete all test chambers in all courses of co-op
Unlocked 25 Dec, 2020 @ 3:26pm

Iron Grip

Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
Unlocked 26 Dec, 2020 @ 4:39pm

Gesticul-8

Perform all 8 gestures of your own volition in co-op
Unlocked 29 Dec, 2016 @ 4:14am

Can't Touch This

Dance in front of a turret blocked by a hard light bridge in co-op
Unlocked 26 Dec, 2020 @ 5:20pm

Empty Gesture

Drop your co-op partner in goo while they are gesturing by removing the bridge under them
Unlocked 26 Dec, 2020 @ 4:41pm

Party of Three

Find the hidden companion cube in co-op test chamber
Unlocked 26 Dec, 2020 @ 5:33pm

Narbacular Drop

Place a portal under your co-op partner while they are gesturing
Unlocked 26 Dec, 2020 @ 5:36pm

Professor Portal

After completing co-op, complete Calibration Course online with a friend who hasn’t played before
Unlocked 29 Dec, 2020 @ 6:02am

Air Show

Perform 2 aerial gestures before touching the ground in co-op
Unlocked 27 Dec, 2016 @ 9:18am

Portal Conservation Society

Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
Unlocked 26 Dec, 2020 @ 5:18pm

Four Ring Circus

Enter 4 different portals without touching the ground in co-op
Unlocked 26 Dec, 2020 @ 5:48pm

Triple Crown

Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
Unlocked 26 Dec, 2020 @ 4:30pm

Still Alive

Complete Course 4 with neither you nor your co-op partner dying
Unlocked 27 Dec, 2020 @ 9:59am

Asking for Trouble

Taunt GLaDOS in front of a camera in each of the five co-op courses
Unlocked 27 Dec, 2020 @ 11:31am

Rock Portal Scissors

Win 3 co-op games of rock-paper-scissors in a row
Unlocked 26 Dec, 2020 @ 1:11pm

Friends List With Benefits

While playing co-op, hug 3 different people on your friends list
Unlocked 27 Jun, 2019 @ 12:44pm

Talent Show

Never lose a cube in Chamber 6 of the Mobility Gels co-op course
Unlocked 27 Dec, 2020 @ 10:57am