No missable achievements (plus 9 unknown)
Sign in with Steam or Xbox to track your progress, and:
Finished Act 1!
Make 200 Girls happy while winning levels!
Get 150 medals in your Bag O' Happy
Finished Act 2!
Finished Act 3!
Leave no bonus unclaimed! WHAT'S IN THE BOX?!
Get gold medals in every level!
Reach level 50 in Nerd Drop!
Beat the final level without any (surviving) Space Seals!