[FIXED UPDATE]Figure I would keep this up in case someone may have troubles like I did with one of the character end game achievements. In the paragraphs below were the steps I did to try and fix this and they didn't seem to work for me. So I read off the Obsidian forum that someone (credit to Alpha of Obsidian Forums) started a new game with the character they were wanting the achievement for and played up until they had a save point (Pilgrim's Road). Save and exited out and then join a friend or random hosts game for the East Forest/Last Boss and play it regularly that way. Finally the achievement unlocked. So if all other methods don't work, try this one!Well I have unfortunately come to the end of my rope with this game, I am not able to obtain the Fiery Judgement achievement for some unknown reason. I know there are a few people with this problem, especially those who are playing on their own game, i.e. they are the host and the character specific achievement is not unlocking for them at the end.
I have cleared my cache, joined someone's game from a save point and worked the way to the final boss, joined at an auto-save at the boss, got defeated at the boss on purpose and reloaded the save, changed storage devices and joined someones game, tried joining a random game.. and still nothing. I didn't have these problems with the other characters and I am not sure why this persists on this achievement.
I do have a save file with an Anjali play through I am working on and I doubt that hinders the achievement being unlocked. I got the level 20 with another person's game just fine while having the same save file.
Not sure what to do or even if I should bother playing through myself and beating it that way, seems like only option. Wondering if anyone else has been having the same issues with character specific achievements not unlocking and what remedy worked for them?
EDIT: Deleted my play through and auto-save, (wasn't far into it anyways) cleared the cache again, and restarted the Xbox. Joined a random game again as Anjali and still no achievement. I will just play it through with Anjali then as it doesn't seem to be working for me the quick way. Hopefully this way shall work.