I've beaten the boss a few times without it eating any corpses, achievement hasn't triggered? I thought maybe it was because I might have reloaded a save after he ate one, so I tried a run where I managed to beat him first try without him eating any, but still nothing?...

So, i just have to complete dungeons a couple of times or how am i supposed to get this achievement?

A few months ago i tried to get it but failed after a couple dozens of runs. Later i learned it was bugged. Is it still bugged?

Having played the prologue a little, I can immediately say I deeply dislike how very quickly my inventory fills without any apparent way to expand my inventory. I have always hated this when I was playing any RPG with a tile-based inventory such as this,

I did some research and supposedly two items enable the Bad Trip effect needed for the achievement - herbal extract and stardust. I have found a couple of times the first one during my 6-hour playtime but the consumable didn't give me the required effect, not a single time. I have still yet to find the infamous stardust. Am I missing something here? the herbal extract is the correct consumable, medicine, right? Is the Bad trip effect guaranteed or its just a small chance? ...