Here is the full list of all 17 MISSING: An Interactive Thriller - there are Episode One achievements.
Solve the block puzzle in less than 5 seconds
Complete all achievements
Hit all quick time event circles
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
Hit the fire trigger on the first try
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
Do not spill any coffee
Completed Chapter 1 of Episode 1
Shut 20 doors or drawers
Complete the hidden word puzzle