So hardcoe mode to me is when you play a character and if you die once then that is the end of that character. (Similar to Diablo 2).

Please post your characters that you lost in the wasteland. I'll start.

One of my favorite character's was a former raider named Scray. I set up several rules for myself including only carrying two weapons at a time.
I limited him to a sniper rifle, an smg, frag mines, and frag grenades. One of the most fun characters I have ever played. once I ran into 3 super mutants at level seven (playing on Vhard/hardcoe with Arwen's realism tweaks) , I nearly [censored] myself. I set elaborate traps with frag mines, took about ten minutes to get it just right, when all of a sudden a group of feral ghouls came rampaging down the hill and attacked the super mutants. When it was all over only one mutant remained, so I took him out with my SR.

One of the most intense moments in gaming history for me because I didn't want him to die. He made it pretty far, level 19. But he ended up running into a large group of super mutants near black mountain and got killed by a stray rocket , which ended his adventures. RIP Scray.

Joe is a DiD character. He lives in Vegas now, but he obviously had his start in Fallout 3.