Here is the full list of all 47 Professor Nasty Time: The Stupidly Unfair Test Simulator 2016 achievements.
Collect your first Donger Medal.
Beat Level 1-1.
Die 100 times.
Die 10 times.
Die for the first time ever.
Play a level in Free Play mode.
Start world 1.
Start world 2.
Start world 3
Start world 4.
Start world 5.
Unlock the Indie Ogre costume.
Unlock the Zardar costume.
Unlock the Pan Pan costume.
Unlock the Dr.Gavin costume.
Unlock the Ronald Thump costume.
Unlock the Yeti Yip costume.
Unlock the Kayeffsii costume.
Unlock the Big D-Hawg costume.
Unlock the Pip Pip 2.0 costume.
Start Lenny world 1.
Start Lenny world 2.
Start Lenny world 3.
Start Lenny world 4.
Collect 8 Donger Medals.
Collect 16 Donger Medals.
Collect 32 Donger Medals.
Collect 64 Donger Medals.
Collect 72 Donger Medals.
Die 500 times.
Die 1,000 times.
Die 10,000 times.
Encounter a rare joke cloud.
Encounter a rare Leeroy Jenkins Cloud.
Defeat Harambe.
Complete the test simulation 100%.
Beat 3 levels playing as Pip Pip.
Beat 3 levels playing as Indie Ogre.
Beat 3 levels playing as Zardar.
Beat 3 levels playing as Pan Pan.
Beat 3 levels playing as Dr.Gavin.
Beat 3 levels playing as Ronald Thump.
Beat 3 levels playing as Yeti Yip.
Beat 3 levels playing as Kayeffsii.
Beat 3 levels playing as Big D-Hawg.
Beat 3 levels playing as Pip Pip 2.0.
Reach the end of the simulation.