Here is the full list of all 45 Broken Age achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Unlock all Broken Age Achievements
Complete Act 2 of Broken Age
Complete Broken Age in under an hour, not counting loading and paused gameplay.
Make someone strut their stuff
Start a group dance party
Find 30 unique reactions to the Spoon
Talk to the boss
Stand up for someone even though you haven't met her
Stand up for someone even though you haven't met him
Find a genius
Tell a great joke in one attempt
Follow up on a successful performance
Commission a custom garment
Visit someone in jail
Get a family member's help on a big project
Clear up a tangled situation in one attempt
Return a heavy duty spaceship part
Deploy a weapon of mass destruction
Return a missing spaceship part
Chart a course away from danger
Reconnect with some old friends
Remove 8 sad faces from the Bassinostra
Execute a PERFECT escape
Get to know a stranger
Hear 20 reasons why Gary won't grab that
Complete Broken Age
Uncover an unsavory scheme
Get to the ship's brain
Answer some tough questions quickly
Take down Mog Chothra
Endure a tight situation as long as you can
Complete all rescue missions with zero errors
Inhibit a powerful entitiy
Take Control of the Boom Arms
Travel to a forbidden location
Disrupt Shay's daily routine
Make a Spoon Sweat
Examine all breakfast options
Leave an isolated town
Feed two different people a healthy snack
Reunite a mother and child
Get to know someone in a precarious position
Escape the Maidens Feast
Learn all you can about Sugar Bunting
Complete Act 1 of Broken Age