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