Here is the full list of all 11 Beacon Pines achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Born in a Barn
Out with a Bang
Close the Book
Catch all the "fish"
The Big Chill
Solve a Riddle
Find a way to kick a melon
Poke around the library
Watermelon Bongo
Find a Charm