Here is the full list of all 46 Omega Labyrinth Life achievements.
You've obtained all achievements.
Maxed out all skills for all characters.
Acquired all Gallery Keys.
Had all characters attain Z Bust Mode.
Completed the Synthesis Codex.
Completed the Item Codex.
Viewed all stories.
Cleared Rinka's Test Site.
Completed the Monster Codex.
Cleared the Secrets of the Clock Tower.
Reached a Luster Value of +99 on a piece of equipment.
Defeated the Reaper.
Cleared A Distant Garden
Successfully stole from the shop.
Used a mic with all playable characters.
Completed the Flower Codex.
Completed the Object Codex.
Cleared a Sage's Trial.
Gone on more than 100 adventures.
Cleared Juri's trial.
Cleared Nanami's trial.
Cleared Mio's trial.
Cleared Mei's trial.
Acquired all expansions.
Emerged victorious in the final battle.
Achieved a score of 200,000 or higher.
Cleared Berune's trial.
Cleared Hinata's trial.
Accumulated more than 200,000 μ of Nectar.
Fully restored the garden.
Cleared Yurika's trial.
Reached Hyper L mode.
Upgraded Luster Value more than 100 times.
Collected seeds 200 times while in dungeons.
Harvested flowers 200 times.
Viewed all main characters' spa events.
Befriend all main characters.
Defeated more than 1,000 monsters.
Gathered more than 100,000 ωP.
Assimilated for the first time.
Pai has appeared.
Changed leaders a total of 10 times.
Spoke to both Greedrat and Petal Gob at least once.
Upgraded Luster Value for the first time.
Restored 3 areas of the garden.
Restored 1 area of the garden.