Actually that's not so hard, I did that on my 2nd playthrough. It's only difficult for like, the first 3-4 Big Daddies up to the fisheries area, after that you get the nade launcher and enough ADAM to do real damage to pretty much everything.j0frenzy said:The one in Bioshock for playing through hard mode without Vita-Chambers. It wouldn't be so hard if not for Big Daddy fights. Still going to give it the old college try at some point soon.
There again I've never used a Vita Chamber once in either of the games, felt like cheating to me.
And yes I have platinums for both Bioshocks.
Most difficult ones I've found would be getting to zone 75 on Wipeout HDs Zone Mode, getting a 20 killstreak against an inhuman opponent on Unreal 3 and winning a "perfect" deathmatch on Warhawk (ie, no deaths). Those are hard.
EDIT; and it seems I got ninja'd. Oh well.