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