Here is the full list of all 12 The Temporal Invasion achievements.
Chapter 4: Quantum Dog
I found the secret book
We found the lost survivor
We found the murderer!
I am qualified for this venture
Chapter 5: Slenderman & The Child
Chapter 6: River Watchers
Chapter 7: Messenger of Aliens?
Chapter 8: Mission Pi
Chapter 9: Behind the Walls
Chapter 10: The History Repeats
Who created this Game? I wanted to know!