No missable achievements (plus 15 unknown)
Sign in with Steam or Xbox to track your progress, and:
Make a full time axis rotation
Die for the first time
Collect 3 gears on 5 levels
Return to the starting cage
Complete 25 levels
Die 25 times on one level
Complete 20 levels as a elderly bird
Complete all of the levels
Collect three gears on 25 levels
Die 1000 times in total
Complete 20 levels as a mid-aged bird
Complete 20 levels as a young bird
Collect three gears on all of the levels
Flawlessly complete 25 levels
Flawlessly complete all of the levels