Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Dog, a Whale and a Clock Walks Into a Hole...	Allow Bob to be woken by a dog, an alarm clock, a whale train and a manhole.
Back to Bed	Get Bob safely to the end of the last level.
Checkmate	Scare five chess pieces.
Conserving Your Resources	Complete level 8 by moving only one apple.
Deeper Into the Dream	Help Bob through the first dream world.
Elitist	Play the game at 13:37.
Groundhog Night	Make Bob walk over the edge 10 times in a single level.
Grown Attached	Spend 10 minutes in one level.
Have We Been Here Before?	Complete the first dream world in nightmare mode.
If at First You Don't Succeed	Retry a single level 5 times.
Just Five More Minutes	Send 10 wheel clocks over the edge.
No Time to Explain!	Skip five cutscenes.
Now You are Thinking With...	Walk through portals 30 times.
Open Sesame	Open a door in nightmare mode.
Patience is a Virtue	Watch the credits to the end.
Smart Guy, Huh?	Complete level 8 in the second dream world by having Bob take a shortcut.
So Much Easier the First Time	Complete the game in nightmare mode.
Speedrunner	Complete levels 1-30 in under 45 minutes.
The Button is Stuck!	Use the fast forward function for a combined 5 minutes.
Understanding the Basics	Complete the first 3 levels to learn the basics of the game.