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