Great topic idea! I would have to say Ermac's Slam fatality that was hard as hell.

The 11hita(or so) Brutalities in MKT

yes definately, i never pulled it off but wish they would bring it back just the same

i always had trouble with quan chi's leg rip and reiko's torso kick in MK4

Shang Tsung's Soul Steal fatality in DA. That's the only fatality I can't get to work for some reason.

...then wouldn't that be easiest?

No one really comes to mind, but the fatalities in MK4 were rather ridiculous.

[Hold HK] F, B, D, U, U, U, tap Block & Run 10 times, HP+LK+RN [Release HK]

woah...i think that might put brutalities to shame.

All brutalities in MKT and all MK4 fatalities. I had to use cheats to perform them.

MK: Trilogy brutalites can pretty much kiss my ass. I re-bought the game last year just to see if I could pull it off out of curiosity. Guess whhaa? It's not happening. The code sequence is retarded to the point only the actual A.I. would understand.

no question cyraxs on umk3 were he blows himself up and the person who he was fighting it was so dame hard Ive never actualy done it!!!!!!!!!!!!!!!

Shang Tsung's Kintaro Morph Fatality. No question. I think it was hold HP for 30 seconds. I've only done it once, and it was incredibly hard! I forgot how I did it.

Scorpion's 2nd fatality on UMK3 for Nintendo DS

The combination is
Right, Right, Down, Up, L-button

It is where you are transported to Scorpion's lair, summons a whole bunch of clones, and kills you. It is one of my favorite fatalities, and also one of the hardest ones I can't perform. There are several others, but to me, this is the hardest.