Here is the full list of all 50 Insect Adventure achievements.
Beat the Game
Beat the Game on Nightmare difficulty
Beat the Game Within 2 and a Half Hours
Beat the Game Within 2 Hours
Beat the Game Within an Hour and a Half
Beat the Game Without Using Consumables
Beat the Game Without Dying on Nightmare
Beat the Game Without Causing Any Alerts
Collect 101% Items
Collect 50% Items
Fill out 100% of the Map
Collect All 100 Golden Bee Tokens
Collect 90 Golden Bee Tokens
Collect 70 Golden Bee Tokens
Defeat Omega Skullhead
Defeat Watcher Queen
Defeat Cockatrice
Defeat Queen Dragonfly
Defeat Titanic Butterfly
Defeat Mass Infection
Defeat Lizardman
Defeat Spore Dragon
Defeat Mantis
Start a New Game on Nightmare Difficulty
Save the Game Before You Hit a Game Over
Get the Double Jump Before Fighting Any Boss
Enter the Final Area Without Rescuing Mayo
Use a Dragonfly to Defeat at Least 5 Enemies in a Row
Carry 999 Leaves at Once
Witness the Demonic Form of a Possessed Android
Lure a Shadow Into Destroying 5 Cockroaches in a Single Room
Deflect a Rock by Sliding Into it
YOU DID IT! All Achievements Completed!