Originally Posted by Nevander
Is this stuff confirmed? Because in Dead Space 2, Hardcore was on Survivalist I'm pretty sure, not Zealot. It would have been a hell of a lot harder if it was. Since Hardcore is not in the demo, you can't possibly know that can you? Also the way the saves in Hardcore work might be different given the title of this achievement, no way to know yet.
I wasn't aware the achievements were known now until seeing the guide and looking them up in the site. That being said, yes Hardcore was Survivalist difficulty with Zealot Drop rates, and the unfortunate mix of Enhanced Slashers gaining 1 hit kill charges.