Here is the full list of all 9 Girls Like Robots achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Leave no bonus unclaimed! WHAT'S IN THE BOX?!
Finished Act 3!
Make 200 Girls happy while winning levels!
Finished Act 2!
Get 150 medals in your Bag O' Happy
Finished Act 1!
Get gold medals in every level!
Reach level 50 in Nerd Drop!
Beat the final level without any (surviving) Space Seals!