Retro Game Tips for Portal 2 (Xbox 360)
Achievement: Air Show
When:
During game
How:
Perform 2 aerial gestures before touching the ground in co-op
Submitted By:
Achievement: Portal Conservation Society
When:
During game
How:
Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
Submitted By:
Achievement: Empty Gesture
When:
During game
How:
Drop your co-op partner in goo while they are gesturing by removing the bridge under them
Submitted By:
Achievement: Narbacular Drop
When:
During game
How:
Place a portal under your co-op partner while they are gesturing
Submitted By:
Achievement: Asking for Trouble
When:
During game
How:
Taunt GLaDOS in front of a camera in each of the five co-op courses
Submitted By:
Achievement: Rock Portal Scissors
Achievement: Friends List With Benefits
When:
During game
How:
While playing co-op, hug 3 different people on your friends list
Submitted By:
Achievement: Four Ring Circus
When:
During game
How:
Enter 4 different portals without touching the ground in co-op
Submitted By:
Achievement: Triple Crown
When:
During game
How:
Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
Submitted By:
Achievement: Still Alive
When:
During game
How:
Complete Course 4 with neither you nor your co-op partner dying
Submitted By:
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