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