Here is the full list of all 40 The Forgotten City achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Free the captive and shoot her captor with your gun
Talk your way through every possible confrontation
Topple 10 peeled statues by kicking others into them
Die from hornet stings
Reach the best ending with the smallest number of loops
Finish the game without looping through time once
Read 10 different grafitti
Skip the city tour
Loop through time ten times
Reach Ending 3 of 4
Reach Ending 4 of 4
Assemble as many people as possible in the Museum
Intimidate the creator of The Golden Rule
Confront the creator of The Golden Rule
Lie 10 times
Save Ulpius's life
Have Duli released from his cell
Help Galerius romance Equitia
Trigger The Golden Rule by stealing 5 times
Reach Ending 1 of 4
Reach Ending 2 of 4
Dodge 3 boulders
Find all three missing persons
Enter the upper cistern in an unconventional way
Solve Vergil's problem
Discover Underworld icons Sisyphus, Tantalus, Ixion and the Belide
Learn the true identity of the stranger by the river
Find treasure using the golden bow
Survive the Palace
Gild your first thing
Steal 2000 coins after the Golden Rule is broken
Discover what lies beneath the city
Save Fabia's life
Save Iulia's life
Get rejected by Aurelia
Enter a villa with a daring leap
Pick up the sponge on a stick
Loop through time once
Allow Fabia to die in the collapsing temple
Use Photo Mode