Here is the full list of all 22 ENIGMA: achievements.
All ENIGMA: achievements earned
Cleared Epilogue
Cleared Envirio ending 1
Cleared Envirio ending 5
Cleared Envirio ending 4
Cleared Envirio ending 3
Cleared Envirio ending 2
Cleared Ignis ending 7
Cleared Ignis ending 6
Cleared Ignis ending 5
Cleared Ignis ending 4
Cleared Ignis ending 3
Cleared Ignis ending 2
Cleared Ignis ending 1
Sophisticated tastes
Cleared Lauro ending 5
Cleared Lauro ending 7
Cleared Lauro ending 6
Cleared Lauro ending 4
Cleared Lauro ending 3
Cleared Lauro ending 2
Cleared Lauro ending 1