Here is the full list of all 46 Digimon Survive achievements.
Unlocked all achievements.
Encountered all monsters.
Completed Truthful route to the next generation.
Beat Fanglongmon Ruin Mode.
Beat Zhuqiaomon.
Beat Azulongmon.
Beat Ebonwumon.
Kunemon reached Mega level.
Lopmon reached Mega level.
Beat Baihumon.
Beat MegaSeadramon.
Took the Truthful route.
Completed the Moral route.
Beat the Master.
Saved Miyuki.
Evolved to Omegamon.
Garurumon reached Mega level.
Beat Plutomon.
Completed the Wrathful route.
Acquired 100 items while exploring.
Syakomon reached Mega level.
Dracmon reached Mega level.
Completed the Harmonious route.
Entered the final battle.
Beat Boltboutamon.
Floramon reached Mega level.
Labramon reached Mega level.
Falcomon reached Mega level.
Agumon reached Mega level.
Renamon reached Mega level.
Reached a fork in the story.
Beat Piedmon.
Beat Wendigomon
Agumon reached Ultimate level.
Beat Garurumon.
Beat Monzaemon.
Evolved a Free Monster.
Beat Cyclonemon.
Beat Arukenimon.
Beat Fangmon.
Beat Dokugumon.
Agumon reached Champion level.
Acquired your first item while exploring.
Recruited a Free Monster.
Agumon reached Rookie level.
Embarked on your adventure.