If I remember correctly, I’ve killed the boss at nether realm depth 5 (in version0.12), but I noticed “Defeat the boss at Nether Realm Depth 5.” achievement was locked again. Now I can no longer fight the boss. Is there any chance I could take back it?
You have to defeat that boss, not necessarily on realm 5. After realm 150, the bosses will repeat again, so you can unlock it at realm 155.
Oh, I see! Thank you for the answer