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