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