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.
Check yourself out in the mirror.
Explore the sleeping plant for evidence of a previous meal.
Find the hidden picture in Chapter 3.
Complete Chapter 3.
Set the correct combination for the Vitruvian sign without first finding the clue for it.
Help the sleeping guard catch the centaur.
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.
Reset your progress on a chapter you've 100% completed.
Start up the game before a certain other time-traveling adventure game was even released.
Hit the unbreakable emergency glass with the hammer three times.
Perform a toast with the mug filled to each level.
Listen to all of the bartender's disclaimers without skipping any.
Find the hidden picture in Chapter 1.
Complete Chapter 1.