Here is the full list of all 20 Kelvin and the Infamous Machine achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Find the hidden picture in the finale.
Dodge Lupin's laser shots until he runs out of one-liners.
Complete the finale.
Reset your progress on a chapter you've 100% completed.
Check yourself out in the mirror.
Set the correct combination for the Vitruvian sign without first finding the clue for it.
Explore the sleeping plant for evidence of a previous meal.
Help the sleeping guard catch the centaur.
Find the hidden picture in Chapter 3.
Complete Chapter 3.
Start up the game before a certain other time-traveling adventure game was even released.
Perform a toast with the mug filled to each level.
Complete Chapter 1.
Experience every excerpt from Newton's fanfiction.
Get kicked out of Newton's yard in three different ways.
Find the hidden picture in Chapter 2.
Complete Chapter 2.
Listen to all of the bartender's disclaimers without skipping any.
Hit the unbreakable emergency glass with the hammer three times.
Find the hidden picture in Chapter 1.