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