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