Here is the full list of all 51 The Greatest Penguin Heist of All Time achievements.
Bake 30 pizzas in one game of Pizza Panic
Rescue the Potato Lover's Girlfriend
Use Mjölnir
Fall into lava inside the temple in The Nile
Bake 10 pizzas in one game of Pizza Panic
Manage to make a chocolate pizza
Play Pizza Panic while dressed as Chef Panguino
Finish Playa del Sol while dressed as Chef Panguino
Kill 100 penguins in cold blood
Find all blueprints in a heist before exfiltrating
Kill 50 penguins in cold blood
Throw 300 punches
Remove all signs of life from a heist
"Accidentally" kill the Undercover Scientist in Research Station
Die for the first time
Noot 1000 times
Unlock 10 blueprints
Finished Research Station in under 30 seconds
Earn 100 000 fish coins from heisting
Finished Military Base on Hardcore difficulty
Finished Pongo City on Hardcore difficulty
Finished Playa Del Sol on Hardcore difficulty
Reunite a mother and her baby
You used your hacking capabilities to access a security system.
Finished Research Station on Hardcore difficulty
Finished Pumpkin Harvest
Finished Pumpkin Harvest on Hardcore difficulty
Poop 100 Times
Finished Pongton
Finished Pongton on Hardcore difficulty
Finished Et tu, Bingus on Hardcore difficulty
Finished Et tu, Bingus
Finished Pongo Coal Mine on Hardcore difficulty
Finished Pongo Coal Mine
Finished The Nile on Hardcore difficulty
Finished The Nile
Finished Dark Castle
Finished Dark Castle on Hardcore difficulty
Slayed Hsif, the Penguin Demon
Discovered the Secret of Dark Castle's Painting
Finished On a Rail
Finished On a Rail on Hardcore difficulty
Finished Pongolantis on Hardcore difficulty
Finished Pongolantis
Finished Military Base
Finished Pongo City
Finished Playa Del Sol
Shoot yourself out of a cannon
Finished Research Station
Finished a heist without being seen
You murdered a penguin in cold blood.