Wake Up Call
Survive the manual override
Hidden achievement
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77.8% of players unlocked this.
You Monster
Reunite with GLaDOS
Hidden achievement
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69% of players unlocked this.
Undiscouraged
Complete the first Thermal Discouragement Beam test
Hidden achievement
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67% of players unlocked this.
Bridge Over Troubling Water
Complete the first Hard Light Bridge test
Hidden achievement
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57.7% of players unlocked this.
SaBOTour
Make a break for it
Hidden achievement
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50.6% of players unlocked this.
Stalemate Associate
Press the button!
Hidden achievement
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49.6% of players unlocked this.
Tater Tote
Carry science forward
Hidden achievement
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44.8% of players unlocked this.
Vertically Unchallenged
Master the Repulsion Gel
Hidden achievement
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46.8% of players unlocked this.
Stranger Than Friction
Master the Propulsion Gel
Hidden achievement
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43.1% of players unlocked this.
White Out
Complete the first Conversion Gel test
Hidden achievement
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41.9% of players unlocked this.
Tunnel of Funnel
Master the Excursion Funnel
Hidden achievement
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38.4% of players unlocked this.
Dual Pit Experiment
Do the same test twice
Hidden achievement
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40.5% of players unlocked this.
The Part Where He Kills You
This is that part
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37.6% of players unlocked this.
Lunacy
That just happened
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37.3% of players unlocked this.
Drop Box
Place a cube on a button without touching the cube
Hidden achievement
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30.9% of players unlocked this.
Overclocker
Complete Test Chamber 10 in 70 seconds
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4.3% of players unlocked this.