Here is the full list of all 17 MISSING: An Interactive Thriller - there are Episode One achievements.
Completed Episode 1
Completed Chapter 5 of Episode 1
Completed Chapter 4 of Episode 1
Fix all parts of the generator
Click 500 times anywhere
Completed Chapter 3 of Episode 1
Completed Chapter 2 of Episode 1
Shut 20 doors or drawers
Do not spill any coffee
Completed Chapter 1 of Episode 1
Complete the hidden word puzzle
Solve the block puzzle in less than 5 seconds
Find the batteries before you need them
Hit the fire trigger on the first try
Hit all quick time event circles
Complete all achievements
Get out of the first room without completing the mystery word puzzle