

Wake Up Call
Survive the manual override
Hidden achievement
Details are hidden to users who have not unlocked it.
77.8% of players unlocked this.


You Monster
Reunite with GLaDOS
Hidden achievement
Details are hidden to users who have not unlocked it.
69% of players unlocked this.


Undiscouraged
Complete the first Thermal Discouragement Beam test
Hidden achievement
Details are hidden to users who have not unlocked it.
67% of players unlocked this.


Bridge Over Troubling Water
Complete the first Hard Light Bridge test
Hidden achievement
Details are hidden to users who have not unlocked it.
57.7% of players unlocked this.


SaBOTour
Make a break for it
Hidden achievement
Details are hidden to users who have not unlocked it.
50.6% of players unlocked this.


Stalemate Associate
Press the button!
Hidden achievement
Details are hidden to users who have not unlocked it.
49.6% of players unlocked this.


Tater Tote
Carry science forward
Hidden achievement
Details are hidden to users who have not unlocked it.
44.8% of players unlocked this.


Vertically Unchallenged
Master the Repulsion Gel
Hidden achievement
Details are hidden to users who have not unlocked it.
46.8% of players unlocked this.


Stranger Than Friction
Master the Propulsion Gel
Hidden achievement
Details are hidden to users who have not unlocked it.
43.1% of players unlocked this.


White Out
Complete the first Conversion Gel test
Hidden achievement
Details are hidden to users who have not unlocked it.
41.9% of players unlocked this.


Tunnel of Funnel
Master the Excursion Funnel
Hidden achievement
Details are hidden to users who have not unlocked it.
38.4% of players unlocked this.


Dual Pit Experiment
Do the same test twice
Hidden achievement
Details are hidden to users who have not unlocked it.
40.5% of players unlocked this.


The Part Where He Kills You
This is that part
Hidden achievement
Details are hidden to users who have not unlocked it.
37.6% of players unlocked this.


Lunacy
That just happened
Hidden achievement
Details are hidden to users who have not unlocked it.
37.3% of players unlocked this.


Drop Box
Place a cube on a button without touching the cube
Hidden achievement
Details are hidden to users who have not unlocked it.
30.9% of players unlocked this.


Overclocker
Complete Test Chamber 10 in 70 seconds
Hidden achievement
Details are hidden to users who have not unlocked it.
4.3% of players unlocked this.