Here is the full list of all 35 Forgotten Hill First Steps achievements.
Collect all documents
Complete the game without hints
Escape the clinic
Deliver all the marbles
Grow a new species
Win the bells game
Kill the nurse
Get killed by a nurse
Hassle the Gambler
Get killed by an unknown creature
Get killed by a leech
Fix hydraulic system
Get killed by flies
A bad awakening
Use the grinder
Hassle Grandpa
Prepare the medicine
Hassle the nurses
Feed the fat guy
Position the marionette
Win the card games
Cut all posters
Play a new sound
Enter the theater
Get killed by a wolf, again
Exit the woods
Cut all trees
Enter the woods
Get killed by a wolf
Waste electricity
Fix electricity
Make a kid happy
Meet the home kid
Meet the home puppy
Move your First Step in Forgotten Hill