Full list of all 52 Investigator achievements.
The base game contains 34 achievements, and there is 1 DLC pack containing 18 achievements.
4 8 15 16 23 42
Make a snowman
Collect five gnomes in the seventh location
Find the saw room
Kick the ball into the goal
Get in the face
Explore the plane
Do not kill spider
Dial pockets full of garbage
Find six gnomes in DLC
Do not kill Steve
Kill Steve
Complete the tenth level
Burn on a hot plate
Play the guitar
Find the gnome on 10 level
Complete the ninth level
Complete the eighth level
Complete the seventh level
Fall through the Ice
Complete the sixth level
You are bitten by a spider at the sixth location
Complete the fifth level
Complete the fourth level
Try to get away from Johnny
Complete the third level
Find the gnome at the third location
Complete the second level
Kill the spider
Complete the first level
Find the gnome in the toilet
Warmed by the fire
Push the barrel into the water
Play the game
Find five balls in "Survivor Update"
Find Artifact in "Survivor Update"
Find new shoes
Too slow! "Survivor Update"
The way "Survivor Update"
Find a suitcase with achievements "Survivor Update"
Finish "Survivor Update"
Find the hidden achievement on the fifth level "Survivor Update"
Look where you're going! This is not Assassin Creed "Survivor Update"
Find a can of fuel "Survivor Update"
You were eaten! "Survivor Update"
Find second Artifact in "Survivor Update"
Play "Survivor Update"