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