Here is the full list of all 32 Deadlings: Rotten Edition achievements.
Complete all levels in Nightmare Mode with maximum rank.
Complete 60 levels in Nightmare Mode.
Complete 45 levels in Nightmare Mode.
Complete 20 levels in Nightmare Mode.
Complete all bonus levels.
Complete all bonus levels with maximum rank.
Complete bonus level 10.
Complete phase 4.
Collect 200 stars.
Complete all levels in Normal Mode with maximum rank.
Discover a crazy mutators.
Complete phase 3.
Discover a freezing freezers.
Collect 150 stars.
Discover an awesome portals!
Complete phase 2.
Collect 100 stars.
Kill the zombie with the other zombie.
Finish 20 levels without killing a single zombie.
Discover a deadly lasers.
Unlock the Lazybrain.
Collect 800 brains.
Complete 5 levels in Nightmare Mode.
Complete level 14 in less than 10 seconds.
Kill over 100 zombies.
Complete phase 1.
Collect 50 stars.
Collect 400 brains.
Collect 150 brains.
Unlock the Gasfat.
Complete level 04 using one zombie.
Unlock the Creep.