Here is the full list of all 31 Dragonfly Chronicles achievements.
GET ONE NOTE ITEM
GET ONE CONCEPT ART ITEM
GET ONE BIO ITEM
DEFEAT THE FIRST BOSS ENEMY
WIN ONE STAGE WITHOUT GETTING DAMAGE
WIN ONE STAGE WITHOUT USING YOUR SKILLS
DEFEAT SUPERTANK IN STAGE 2
WIN THE PARASITE WORM BEFORE YOU GET EATEN!
ESCAPE FROM THE DRAGONFLY COMPLEX AND DESTROY PARASITE WORM
DESTROY 100 ENEMIES IN STAGE 3
MAKE YOUR WAY THROUGH MOVING WALLS IN STAGE 4
DESTROY STAGE 4 SUPER MACHINE
MAKE YOUR WAY THROUGH MOVING SECTION IN STAGE 4
DESTROY ALL BOMBS IN STAGE 5
DESTROY DRILL TANK IN STAGE 5
SURVIVE STAGE 6 DEADLY WHEELS
DESTROY SUPER EMBRIO IN STAGE 6
DESTROY 100 ENEMIES IN STAGE 7
DESTROY THE SUB-BOSS SPACESHIP IN ANY OF ITS ENCOUNTERS WITH MEDIUM OR HIGH HEALTH
DESTROY STAGE 7 BOSS
COMPLETE STAGE 8 GRAVITY ZONE
COMPLETE ALL DRAGONFLY CHRONICLES STAGES
DEFEAT DAVID PARK BEFORE 2 MINUTES
DEFEAT DAVID DRAGONFLY BEFORE 2 MINUTES
DEFEAT THE ULTIMATE DRAGONFLY
BEAT DRAGONFLY CHRONICLES
GET ALL THE NOTES ITEMS OF THE GAME
GET ALL CONCEPTS ITEMS OF THE GAME
GET ALL BIO ITEMS OF THE GAME
GET ALL THE NOTES, CONCEPTS AND BIOS ITEMS
GET ALL NOTES ITEMS TO UNLOCK THE TRUE ENDING