Here is the full list of all 11 Shiver achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Don't use a single cigarette while in the park
Complete the game
Smoke six cigarettes
Call for help with the radio
Escape Mort's Mine
Teach that creepy mole a lesson
Smoke by the no smoking sign
Remove the lock with the power of science
Enter Mort's Mine
Start the Generator
Arrive at Windy Oaks National Park