Here is the full list of all 17 MISSING: An Interactive Thriller - there are Episode One achievements.
Find the batteries before you need them
Get out of the first room without completing the mystery word puzzle
Completed Episode 1
Completed Chapter 5 of Episode 1
Completed Chapter 4 of Episode 1
Fix all parts of the generator
Completed Chapter 3 of Episode 1
Click 500 times anywhere
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
Hit the fire trigger on the first try
Hit all quick time event circles
Complete all achievements