Alright Achievement Hoarders. Its time to show off to your internet peers. What Xbox 360 achievement do you believe was the hardest to obtain in what game and what's the story behind it all?

Why did you strive towards attempting to gain that achievement?

Was it simply for the gamerscore?

Were you challanged by a friend?

Did you think it was going to be easy, but couldn't stop yourself when you found out it was hard?

Lets show off!

Mine is "The Hoarder - 25 gamerscore" Fable 2

Normally I hate finding every single of X item in a game, but my friend challanged me that he could find all gargolyes before I could find all silver keys. I won of course, the loser had to share their achievement (in his case, the Gargolye) with the winner. So not only did I manage to get the hoarder, but I got a free "The Gargolye" achievement out of it too. Lucky me, I would have hated to get that one too.

Hmm

Beating Megaman Zero 3 on hardmode in under 3 hours. That was fun more than it was hard.

Beating Alma in Ninja Gaiden. She was a fucking bitch.

In Capcom vs SNK 2, I was able to get perfects in both games against Shin Akuma and God Rugal on the hardest setting. Finishing arcade mode with a 3000gp on the hardest setting.

I don't know, I've a lot of little things. I love a challenge, lol.

I plan on getting 1000/1000 in Tales of Vesperia and I will beat in on all 4 difficulty settings. I'll also complete every side quest.

I'm not sure what my next goal will be after that.

Thats the first "hard" achievement I plan to get, and show off. Vesperia master is a insanely hard achievement I want to get. Even if its only worth 0 gamerscore, thats a game thats worth 3 or 4 playthoughs to get.

Well, might not be very hard, but took some time - "Key to the City" in GTA4.

I got every achievement in TotemBall. A game almost no one has ever heard of, which even less people can play since you need the XBOX Vision cam, which less still would play because of how awful it is. And I kicked it's ass. =P

Balls of Steel and Little Sister Saviour, both on my first Bioshock run.

Maybe Seriously 2.0, it just took so long to get

I did it to complete the 1000

That's the toughest I've unlocked.  No other compares.

There's no vagina.... Vagina's normally have a bulge.... WTF!!!!! SHE HAS AN INNY VAGINA!!! AAAAAAAAHHHHHHHHH

Mine would be Transmissionary in Dead Rising. I got all the achievements for this game, except the two "infinite mode" achievements which involve respectively 10 hours and 14 hours of play without dying and without saving... I prefered not to try those two, wouldn't bear dying after 13 hours of playtime with no save.