Here is the full list of all 23 ABYSS OF THE SACRIFICE achievements.
Cleared Eternity. Is there truly a surface in the future Chloe awakens to?
Cleared Revelation. Even after all is lost, faith remains strong.
Cleared the bad ending of Zero. Jitka is gone, and the surface is left in ruins. Could there have been another way...?
Cleared Six. Even with despair awaiting them, obsession drives the girls to gaze into the abyss.
Cleared Contagion. Olga learns a virus is behind the rage, but...
Cleared Weed. A weed always searches for where it belongs.
Cleared Name. Is Chloe truly the chosen one, as she believes?
Cleared Treasure. Asuna is her father's treasure.
Cleared Legs. She took away everything...and Miki will have her revenge.
Cleared Tea. Olga's tea always warms the heart.
The tea brewed came out mediocre. Olga's father would never be satisfied with this.
Cleared Ghost. Is it hope that lies ahead? Or despair?
Cleared Fetal Pulse. One passion burns in Miki's heart--revenge.
Cleared Fake. Live on, girls!
Cleared Operation. With two flames of life extinguished, new shadows are cast on their destination.
Cleared the true ending of Zero. Jitka has finally found her place.
Cleared Feather. After all the sacrifices made to get to the surface, could it be anything but gray?
Cleared Loop. No matter how hard they try, the future lies just out of reach.
Cleared Seal. Unable to save her friends, Olga fights to atone for her sins.
Cleared The Surface. Budding in their hearts is the hope of a new world.
Played Orange to a draw in Unit Battle. What Chloe desires, however, is a perfect victory.
Entered "JITKA" into the cold sleep pod. Almost expecting to be wrong, she hopes against hope...
Held the maximum number of items. Even with Miki and Chloe working together, 12 items is the max.