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