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.
Catch all the "fish"
Poke around the library
Find a way to kick a melon
Watermelon Bongo
Close the Book
Out with a Bang
The Big Chill
Solve a Riddle
Born in a Barn
Find a Charm