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