Well, the last time, I was level 6/7 starting Depot A on Oddity. That's on the lower side, but 12 seems very overpowered.
(play oddity)
12 is a bit high (hitting level 10 when turning in the armadillo parts is about right), but "very" overpowered? You're all absolutely insane. I know this game better than the palm of my hand knows my dick, and going in at level 6 on Hard is completely daft.
There is LITERALLY no way on God's Earth for a low-PER, sub-level 8 character to survive that area in any event without save-scumming or else carpet-bombing every inch of it, both of which are extremely cheesy. None exists. Goggles and food aren't even enough to see the mines that will surely kill you in one hit. That's notwithstanding the snipe-distance, multi-turn entangles and -15 per-hit acid puddles that you won't initially have any protection against unless you get lucky/camp a vendor or resort to truly extreme kiting and corner-abusing.
It still gives me a stiff challenge even though I know exactly how many enemies there are, what they are, where they are, and even (three and half years since I last played) where most of the mines are.