Here is the full list of all 15 Sign Motion achievements.
Seeing beyond the problem.
Improvised an umbrella.
Got yourself some wheels.
Don't look now but you are being followed.
The mind drifts away.
Tiptoed over a hot surface.
Escaped a tough combination.
Divide and conquer.
Melted your way through.
You are there when someone needs a little push.
The taxi driver is not happy about the disruption.
Better wear a helmet next time.
Floated through the street flawlessly.
Close, very close.
You have overcome every obstacle.