These are achievements that you can acquire by simply playing through the game from start to finish.

Welcome To Windy Oaks
Arrive at Windy Oaks National Park


Zeus
Start the Generator


Downward Spiral
Enter Mort's Mine


Clever Solution
Remove the lock with the power of science


Fresh Air
Escape Mort's Mine


Mayday
Call for help with the radio


Goodbye Windy Oaks
Complete the game

These are missable achievements that are not tied to the story.

Underground Rebel
Smoke by the no smoking sign


- While in the underground area, light a cigarette next to the "No Smoking" sign.

Whack-a-mole
Teach that creepy mole a lesson


- Also while in the underground area, use your hatchet to destory the head of the "creepy mole" statue.

Chain-smoker
Smoke six cigarettes


- During your playthrough of the game, at any point, try to light six cigarettes.

I Quit
Don't use a single cigarette while in the park


- Don't light a single cigarette during your playthrough of the game, with the exception of the cigarette you have to light during the intro of the game.