Here is the full list of all 46 Ninja Turdle achievements.
Terminated 25,000 Parasites
Hard Mode Complete
Terminated 10,000 Parasites
Visited Every Map
Obtained all Life Exapnsions
Obtained all Corn Expansions
Obtained Cornado
Obtained Candy Corn
Obtained Coffee Cup
Obtained Hadoupoo
Defeated Coronavirus Omega
Obtained Shoryupoo
Defeated Giant Larva
Obtained Vaccine Mask
Obtained Corn Mask
Obtained Z-1000 Mask
Hardest Mode Complete
You didn't save Steve in time.
Obtained Popcorn
Obtained Worm Mask
Obtained Glitch Mask
Obtained Water Mask
Obtained Wall Jump Boots
Obtained Super Anti-Acid Pill
Obtained Double Jump Cape
Defeated Poopy Worm
Defeated Mother Worm
Normal Mode Complete
Thanks for watching all the credits!
Defeated Brain Leech
Terminated 1,000 Parasites
Obtained Sonar Mask
Obtained Corn Spread
Obtained Dung Beetle
Obtained Climb Gloves
Obtained Anti-Acid Pill
Obtained Diarrhea Pill
Defeated Fat Worm
Defeated Bore Worm
Defeated Larva Queen
Defeated Tapeworm Swarm
Obtained Turd Toss
Obtained Corn Chunker
Obtained Blood Mask
Defeated Tapeworm
Defeated Heartworm