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.
Typed DAGON to solve the panel 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.
Reached the top of the lighthouse.
Cthulhu ftaghn.
Killed by the smugglers.
Shadowed the lookout to the smugglers' lair.
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.
Asked everyone for a working pen.
Swapped the pen for the train model.
Solved the tiara puzzle.
Crashed the game by asking too many questions about the mirror.
Read every book from the library.
Said all the fake names for Andrew Hopelow.
Got Melvin fired.
Saw Andrew Hopelow dancing to the Whateley Hillbillies' music.
Spoke to Junior.
Kicked out by Madame Tilton.
Asked the barman for advice.
Found the YMCA.
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.