Here is the full list of all 11 Beacon Pines achievements. It takes around 5-6 hours to unlock all of the achievements on Windows.
Catch all the "fish"
Find a way to kick a melon
Close the Book
Out with a Bang
Solve a Riddle
The Big Chill
Poke around the library
Born in a Barn
Watermelon Bongo
Find a Charm