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