Portal 2

25 of 51 ach. unlocked (50%)
Decicus' achievements in Portal 2
Perform 2 aerial gestures before touching the ground in co-op
Apr 27, 13
Complete all test chambers in the Hard-Light Surfaces co-op course
Apr 27, 13
Complete the first Hard Light Bridge test
Dec 1, 11
Complete all test chambers in the Mass and Velocity co-op course
Mar 17, 12
Place a cube on a button without touching the cube
Aug 3, 13
Do the same test twice
May 10, 12
Perform all 8 gestures of your own volition in co-op
Apr 27, 13
Take GLaDOS' escape advice
Feb 8, 12
Celebrate your cooperative calibration success
Mar 17, 12
That just happened
Dec 1, 11
Save a turret from redemption
Feb 8, 12
Complete all test chambers in the Excursion Funnels co-op course
Apr 27, 13
Break the rules in Test Chamber 07
Nov 5, 11
Make a break for it
Feb 8, 12
Stand in a defective turret detector
Feb 8, 12
Master the Propulsion Gel
Feb 10, 12
Carry science forward
Feb 9, 12
Complete all test chambers in the Team Building co-op course
Mar 17, 12
This is that part
Master the Excursion Funnel
Aug 1, 12
Complete the first Thermal Discouragement Beam test
Nov 5, 11
Master the Repulsion Gel
Feb 9, 12
Survive the manual override
Nov 4, 11
Complete the first Conversion Gel test
Feb 10, 12
Reunite with GLaDOS
Nov 5, 11
Taunt GLaDOS in front of a camera in each of the five co-op courses
Locked
Dance in front of a turret blocked by a hard light bridge in co-op
Locked
Examine all the vitrified test chamber doors
Locked
Drop your co-op partner in goo while they are gesturing by removing the...
Locked
Find the hidden signal in one of the Rat Man's dens
Locked
Enter 4 different portals without touching the ground in co-op
Locked
While playing co-op, hug 3 different people on your friends list
Locked
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
Locked
Place a portal under your co-op partner while they are gesturing
Locked
Complete Test Chamber 10 in 70 seconds
Locked
Find the hidden companion cube in co-op test chamber
Locked
Show that pit who's boss
Locked
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total...
Locked
Find a hidden portrait
Locked
After completing co-op, complete Calibration Course online with a friend who...
Locked
Use an Aerial Faith Plate to launch a turret
Locked
Win 3 co-op games of rock-paper-scissors in a row
Locked
Catch a blue-painted box before it touches the ground
Locked
Discover the missing experiment
Locked
Break 11 test chamber monitors
Locked
Press the button!
Locked
Complete Course 4 with neither you nor your co-op partner dying
Locked
Never lose a cube in Chamber 6 of the Mobility Gels co-op course
Locked
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
Locked
Refuse to solve the first test in Chapter 8
Locked
Complete all test chambers in all courses of co-op
Locked
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