Here is the full list of all 42 Chronicle of Innsmouth achievements.
Crashed the game by asking too many questions about the mirror.
Solved the tiara puzzle.
Read every book from the library.
Said all the fake names for Andrew Hopelow.
Got Melvin fired.
Spoke to Junior.
Found the YMCA.
Kicked out by Madame Tilton.
Asked the barman for advice.
Read the spine of every book in the library.
Slipped on a Freudian phallic symbol peel.
Found all the letters.
Saw the young librarian in his Ace Of Spades era.
Met the shady thug for the first time.
Distracted by a classic quote.
Looked at the short man.
Began the game for the first time.
Witnessed a brutal beating.
Showed the article about Melvin in the paper.
Asked everyone for a working pen.
Saw Andrew Hopelow dancing to the Whateley Hillbillies' music.
Swapped the pen for the train model.
Solved the combination puzzle.
Gave the train model to the train geek.
Arrived in Innsmouth.
Learned about "The Innsmouth Look".
Explored every last nook of Innsmouth.
Entered the refinery.
Killed by the smugglers.
Chose a side.
Never used the hotspot help option.
Watched cutscene.
Shot both Deep Ones.
Shadowed the lookout to the smugglers' lair.
Looked at the gigantic skull several times.
Cthulhu ftaghn.
Reached the top of the lighthouse.
Fell asleep to the soothing sound of the sea.
Ran away without a second look!
Escaped from the shoggoth.
Dodged the bombardment and escaped Innsmouth!
Typed DAGON to solve the panel puzzle.