Here is the full list of all 19 Shardlight achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
You maintained the status quo.
Tip your hat to the new revolution.
You completed the game.
An age of uncertainty, but of happiness.
You don't mind being poked and prodded.
Figure out why the rebel doesn't speak.
You're the most well-read person around.
Gus doesn't know art, but he knows what he hates.
You're never too old to have fun.
Properly disposed of the severed arm.
You couldn't let a friend suffer.
Played through the game with commentary.
Said the code phrase to everyone.
Gain Jess's trust.
Listen to every single comment Denby makes inside the factory.
Tasty, but think of your triglycerides!
Don't encourage him.
You drew the symbol correctly on the first try.
Nothing like a nice hot meal.