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.
Looked at the gigantic skull several times.
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.
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.
Looked at the short man.
Asked everyone for a working pen.
Solved the tiara puzzle.
Crashed the game by asking too many questions about the mirror.
Read every book from the library.
Spoke to Junior.
Got Melvin fired.
Read the spine of every book in the library.
Slipped on a Freudian phallic symbol peel.
Found the YMCA.
Kicked out by Madame Tilton.
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.
Began the game for the first time.
Showed the article about Melvin in the paper.
Asked the barman for advice.
Said all the fake names for Andrew Hopelow.
Saw Andrew Hopelow dancing to the Whateley Hillbillies' music.
Typed DAGON to solve the panel puzzle.