Warning you right now, the list below is full of spoilers for the upcoming release of Portal 2. The list comes to us from Game Rant and may be subject to change before the game's final release.
You have been warned.
[spoil="list of Portal 2 achievements, read at your own risk"] Wake Up Call
Survive the manual override (5)
You Monster
Reunite with GLaDOS (5)
Undiscouraged
Complete the first Thermal Discouragement Beam test (10)
Bridge Over Troubling Water
Complete the first Hard Light Bridge test (10)
SaBOTour
Make a break for it (10)
Stalemate Associate
Press the button! (15)
Tater Tote
Carry science forward (15)
Vertically Unchallenged
Master the Repulsion Gel (15)
Stranger Than Friction
Master the Propulsion Gel (15)
White Out
Complete the first Conversion Gel test (15)
Tunnel of Funnel
Master the Excursion Funnel (15)
Dual Pit Experiment
Do the same test twice (15)
The Part Where He Kills You
This is that part (20)
Lunacy
That just happened (20)
Drop Box
Place a cube on a button without touching the cube (20)
Overclocker
Complete Test Chamber 10 in 70 seconds (30)
Pit Boss
Show that pit who’s boss (30)
Preservation of Mass
Break the rules in Test Chamber 07 (20)
Pturretdactyl
Use an Aerial Faith Plate to launch a turret (5)
Final Transmission
Find the hidden signal in one of the Rat Man’s dens (20)
Good Listener
Take GLaDOS’ escape advice (5)
Scanned Alone
Stand in a defective turret detector (5)
No Hard Feelings
Save a turret from redemption (10)
Schrodinger’s Catch
Catch a blue-painted box before it touches the ground (20)
Ship Overboard
Discover the missing experiment (10)
Door Prize
Examine all the vitrified test chamber doors (20)
Portrait of a Lady
Find a hidden portrait (10)
You Made Your Point
Refuse to solve the first test in Chapter 8 (10)
Smash TV
Break 11 test chamber monitors (75)
High Five
Celebrate your cooperative calibration success (5)
Team Building
Complete all test chambers in the Team Building co-op course (10)
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course (10)
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course (15)
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course (15)
You Saved Science
Complete all test chambers in all courses of co-op (100)
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course (20)
Gesticul-8
Perform all 8 gestures of your own volition in co-op (15)
Can’t Touch This
Dance in front of a turret blocked by a hard light bridge in co-op (10)
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them (25)
Party of Three
Find the hidden companion cube in co-op test chamber (25)
Narbacular Drop
Place a portal under your co-op partner while they are gesturing (25)
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before (75)
Air Show
Perform 2 aerial gestures before touching the ground in co-op (20)
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements (20)
Four Ring Circus
Enter 4 different portals without touching the ground in co-op (25)
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each (15)
Still Alive
Complete Course 4 with neither you nor your co-op partner dying (15)
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses (10)
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row (20)
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list (50)[/spoil]
You have been warned.
[spoil="list of Portal 2 achievements, read at your own risk"] Wake Up Call
Survive the manual override (5)
You Monster
Reunite with GLaDOS (5)
Undiscouraged
Complete the first Thermal Discouragement Beam test (10)
Bridge Over Troubling Water
Complete the first Hard Light Bridge test (10)
SaBOTour
Make a break for it (10)
Stalemate Associate
Press the button! (15)
Tater Tote
Carry science forward (15)
Vertically Unchallenged
Master the Repulsion Gel (15)
Stranger Than Friction
Master the Propulsion Gel (15)
White Out
Complete the first Conversion Gel test (15)
Tunnel of Funnel
Master the Excursion Funnel (15)
Dual Pit Experiment
Do the same test twice (15)
The Part Where He Kills You
This is that part (20)
Lunacy
That just happened (20)
Drop Box
Place a cube on a button without touching the cube (20)
Overclocker
Complete Test Chamber 10 in 70 seconds (30)
Pit Boss
Show that pit who’s boss (30)
Preservation of Mass
Break the rules in Test Chamber 07 (20)
Pturretdactyl
Use an Aerial Faith Plate to launch a turret (5)
Final Transmission
Find the hidden signal in one of the Rat Man’s dens (20)
Good Listener
Take GLaDOS’ escape advice (5)
Scanned Alone
Stand in a defective turret detector (5)
No Hard Feelings
Save a turret from redemption (10)
Schrodinger’s Catch
Catch a blue-painted box before it touches the ground (20)
Ship Overboard
Discover the missing experiment (10)
Door Prize
Examine all the vitrified test chamber doors (20)
Portrait of a Lady
Find a hidden portrait (10)
You Made Your Point
Refuse to solve the first test in Chapter 8 (10)
Smash TV
Break 11 test chamber monitors (75)
High Five
Celebrate your cooperative calibration success (5)
Team Building
Complete all test chambers in the Team Building co-op course (10)
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course (10)
Bridge Building
Complete all test chambers in the Hard-Light Surfaces co-op course (15)
Obstacle Building
Complete all test chambers in the Excursion Funnels co-op course (15)
You Saved Science
Complete all test chambers in all courses of co-op (100)
Iron Grip
Never lose a cube in Chamber 6 of the Mass and Velocity co-op course (20)
Gesticul-8
Perform all 8 gestures of your own volition in co-op (15)
Can’t Touch This
Dance in front of a turret blocked by a hard light bridge in co-op (10)
Empty Gesture
Drop your co-op partner in goo while they are gesturing by removing the bridge under them (25)
Party of Three
Find the hidden companion cube in co-op test chamber (25)
Narbacular Drop
Place a portal under your co-op partner while they are gesturing (25)
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before (75)
Air Show
Perform 2 aerial gestures before touching the ground in co-op (20)
Portal Conservation Society
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements (20)
Four Ring Circus
Enter 4 different portals without touching the ground in co-op (25)
Triple Crown
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each (15)
Still Alive
Complete Course 4 with neither you nor your co-op partner dying (15)
Asking for Trouble
Taunt GLaDOS in front of a camera in each of the five co-op courses (10)
Rock Portal Scissors
Win 3 co-op games of rock-paper-scissors in a row (20)
Friends List With Benefits
While playing co-op, hug 3 different people on your friends list (50)[/spoil]