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51 of 51 (100%) Achievements Earned::

Personal Achievements
 

Wake Up Call

Survive the manual override
Unlocked 25 Dec, 2018 @ 7:21am

You Monster

Reunite with GLaDOS
Unlocked 25 Dec, 2018 @ 7:38am

Undiscouraged

Complete the first Thermal Discouragement Beam test
Unlocked 25 Dec, 2018 @ 7:43am

Bridge Over Troubling Water

Complete the first Hard Light Bridge test
Unlocked 25 Dec, 2018 @ 8:05am

SaBOTour

Make a break for it
Unlocked 25 Dec, 2018 @ 8:25am

Stalemate Associate

Press the button!
Unlocked 25 Dec, 2018 @ 8:49am

Tater Tote

Carry science forward
Unlocked 4 Jan, 2019 @ 7:47pm

Vertically Unchallenged

Master the Repulsion Gel
Unlocked 25 Dec, 2018 @ 9:32am

Stranger Than Friction

Master the Propulsion Gel
Unlocked 4 Jan, 2019 @ 7:59pm

White Out

Complete the first Conversion Gel test
Unlocked 4 Jan, 2019 @ 8:04pm

Tunnel of Funnel

Master the Excursion Funnel
Unlocked 26 Dec, 2018 @ 11:32am

Dual Pit Experiment

Do the same test twice
Unlocked 4 Jan, 2019 @ 8:16pm

The Part Where He Kills You

This is that part
Unlocked 26 Dec, 2018 @ 11:39am

Lunacy

That just happened
Unlocked 26 Dec, 2018 @ 11:56am

Drop Box

Place a cube on a button without touching the cube
Unlocked 25 Dec, 2018 @ 7:55am

Overclocker

Complete Test Chamber 10 in 70 seconds
Unlocked 25 Dec, 2018 @ 8:03am

Pit Boss

Show that pit who's boss
Unlocked 26 Dec, 2018 @ 11:40am

Preservation of Mass

Break the rules in Test Chamber 07
Unlocked 25 Dec, 2018 @ 7:57am

Pturretdactyl

Use an Aerial Faith Plate to launch a turret
Unlocked 28 Dec, 2018 @ 3:47pm

Final Transmission

Find the hidden signal in one of the Rat Man's dens
Unlocked 25 Dec, 2018 @ 7:54am

Good Listener

Take GLaDOS' escape advice
Unlocked 25 Dec, 2018 @ 8:28am

Scanned Alone

Stand in a defective turret detector
Unlocked 25 Dec, 2018 @ 8:39am

No Hard Feelings

Save a turret from redemption
Unlocked 25 Dec, 2018 @ 8:34am

Schrodinger's Catch

Catch a blue-painted box before it touches the ground
Unlocked 4 Jan, 2019 @ 7:43pm

Ship Overboard

Discover the missing experiment
Unlocked 4 Jan, 2019 @ 7:53pm

Door Prize

Examine all the vitrified test chamber doors
Unlocked 4 Jan, 2019 @ 7:53pm

Portrait of a Lady

Find a hidden portrait
Unlocked 4 Jan, 2019 @ 7:50pm

You Made Your Point

Refuse to solve the first test in Chapter 8
Unlocked 4 Jan, 2019 @ 8:15pm

Smash TV

Break 11 test chamber monitors
Unlocked 5 Jan, 2019 @ 5:29pm

High Five

Celebrate your cooperative calibration success
Unlocked 2 Mar, 2019 @ 7:56pm

Team Building

Complete all test chambers in the Team Building co-op course
Unlocked 2 Mar, 2019 @ 8:20pm

Confidence Building

Complete all test chambers in the Mass and Velocity co-op course
Unlocked 3 Mar, 2019 @ 4:49pm

Bridge Building

Complete all test chambers in the Hard-Light Surfaces co-op course
Unlocked 4 Mar, 2019 @ 5:30pm

Obstacle Building

Complete all test chambers in the Excursion Funnels co-op course
Unlocked 5 Mar, 2019 @ 6:17pm

You Saved Science

Complete all test chambers in all courses of co-op
Unlocked 7 Mar, 2019 @ 3:23pm

Iron Grip

Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
Unlocked 10 Jan, 2021 @ 5:10pm

Gesticul-8

Perform all 8 gestures of your own volition in co-op
Unlocked 4 Mar, 2019 @ 5:59pm

Can't Touch This

Dance in front of a turret blocked by a hard light bridge in co-op
Unlocked 3 Mar, 2019 @ 5:30pm

Empty Gesture

Drop your co-op partner in goo while they are gesturing by removing the bridge under them
Unlocked 3 Mar, 2019 @ 5:11pm

Party of Three

Find the hidden companion cube in co-op test chamber
Unlocked 12 Jan, 2021 @ 4:57pm

Narbacular Drop

Place a portal under your co-op partner while they are gesturing
Unlocked 9 Jan, 2021 @ 11:45am

Professor Portal

After completing co-op, complete Calibration Course online with a friend who hasn’t played before
Unlocked 9 Jan, 2021 @ 10:22am

Air Show

Perform 2 aerial gestures before touching the ground in co-op
Unlocked 2 Mar, 2019 @ 8:26pm

Portal Conservation Society

Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
Unlocked 10 Jan, 2021 @ 5:53pm

Four Ring Circus

Enter 4 different portals without touching the ground in co-op
Unlocked 10 Jan, 2021 @ 6:24pm

Triple Crown

Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
Unlocked 10 Jan, 2021 @ 5:25pm

Still Alive

Complete Course 4 with neither you nor your co-op partner dying
Unlocked 16 Jan, 2021 @ 10:27am

Asking for Trouble

Taunt GLaDOS in front of a camera in each of the five co-op courses
Unlocked 10 Jan, 2021 @ 4:18pm

Rock Portal Scissors

Win 3 co-op games of rock-paper-scissors in a row
Unlocked 10 Jan, 2021 @ 4:31pm

Friends List With Benefits

While playing co-op, hug 3 different people on your friends list
Unlocked 10 Jan, 2021 @ 4:21pm

Talent Show

Never lose a cube in Chamber 6 of the Mobility Gels co-op course
Unlocked 11 Jan, 2021 @ 5:35pm