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Air Show Perform 2 aerial gestures before touching the ground in co-op
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Asking for Trouble Taunt GLaDOS in front of a camera in each of the five co-op courses
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Can't Touch This Dance in front of a turret blocked by a hard light bridge in co-op
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Empty Gesture Drop your co-op partner in goo while they are gesturing by removing the bridge under them
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Friends List With Benefits While playing co-op, hug 3 different people on your friends list
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Gesticul-8 Perform all 8 gestures of your own volition in co-op
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High Five Celebrate your cooperative calibration success
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Narbacular Drop Place a portal under your co-op partner while they are gesturing
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Rock Portal Scissors Win 3 co-op games of rock-paper-scissors in a row
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