Portal 2 Achievements revealed, prompt more Half-Life 2: Episode 3 speculation

All fifty Portal 2 Achievements have been revealed by Xbox 360 Achievements. The list is rife with the expected inside jokes and word-play (Still Alive, Pturretdactyl, Bridge Over Troubling Water), but one in particular has a the internet talking with its fingers.

The "Ship Overboard" Achievement bears the description, "Discover the missing experiment." Could it be referring to the Borealis - the Aperture project mentioned in Half-Life 2: Episode Two? Speculate away! The full list is below:

• Pit Boss (30)
  Show that pit who's boss
• Preservation of Mass (20)
  Break the rules in Test Chamber 07
• Pturretdactyl (5)
  Use an Aerial Faith Plate to launch a turret
• Lunacy (20)
  That just happened
• Drop Box (20)
  Place a cube on a button without touching the cube
• Overclocker (30)
  Complete Test Chamber 10 in 70 seconds
• No Hard Feelings (10)
  Save a turret from redemption
• Schrodinger's Catch (20)
  Catch a blue-painted box before it touches the ground
• Ship Overboard (10)
  Discover the missing experiment
• Final Transmission (20)
  Find the hidden signal in one of the Rat Man's dens
• Good Listener (5)
  Take GLaDOS' escape advice
• Scanned Alone (5)
  Stand in a defective turret detector
• The Part Where He Kills You (20)
  This is that part
• Bridge Over Troubling Water (10)
  Complete the first Hard Light Bridge test
• SaBOTour (10)
  Make a break for it
• Stalemate Associate (15)
  Press the button!
• Wake Up Call (5)
  Survive the manual override
• You Monster (5)
  Reunite with GLaDOS
• Undiscouraged (10)
  Complete the first Thermal Discouragement Beam test
• White Out (15)
  Complete the first Conversion Gel test
• Tunnel of Funnel (15)
  Master the Excursion Funnel
• Dual Pit Experiment (15)
  Do the same test twice
• Tater Tote (15)
  Carry science forward
• Vertically Unchallenged (15)
  Master the Repulsion Gel
• Stranger Than Friction (15)
  Master the Propulsion Gel
• Professor Portal (75)
  After completing co-op, complete Calibration Course online with a friend who hasn%26rsquo;t played before
• Air Show (20)
  Perform 2 aerial gestures before touching the ground in co-op
• Portal Conservation Society (20)
  Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
• Empty Gesture (25)
  Drop your co-op partner in goo while they are gesturing by removing the bridge under them
• Party of Three (25)
  Find the hidden companion cube in co-op test chamber
• Narbacular Drop (25)
  Place a portal under your co-op partner while they are gesturing
• Asking for Trouble (10)
  Taunt GLaDOS in front of a camera in each of the five co-op courses
• Rock Portal Scissors (20)
  Win 3 co-op games of rock-paper-scissors in a row
• Friends List With Benefits (50)
  While playing co-op, hug 3 different people on your friends list
• Four Ring Circus (25)
  Enter 4 different portals without touching the ground in co-op
• Triple Crown (15)
  Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
• Still Alive (15)
  Complete Course 4 with neither you nor your co-op partner dying
• Can't Touch This (10)
  Dance in front of a turret blocked by a hard light bridge in co-op
• Smash TV (75)
  Break 11 test chamber monitors
• High Five (5)
  Celebrate your cooperative calibration success
• Team Building (10)
  Complete all test chambers in the Team Building co-op course
• Door Prize (20)
  Examine all the vitrified test chamber doors
• Portrait of a Lady (10)
  Find a hidden portrait
• You Made Your Point (10)
  Refuse to solve the first test in Chapter 8
• You Saved Science (100)
  Complete all test chambers in all courses of co-op
• Iron Grip (20)
  Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
• Gesticul-8 (15)
  Perform all 8 gestures of your own volition in co-op
• Confidence Building (10)
  Complete all test chambers in the Mass and Velocity co-op course
• Bridge Building (15)
  Complete all test chambers in the Hard-Light Surfaces co-op course
• Obstacle Building (15)
  Complete all test chambers in the Excursion Funnels co-op course

We'll be getting another look at Portal 2 on March 12th at PAX East - stay tuned for our impresions!

Feb 28, 2011