HARDEST ACHIEVEMENT YOU EVER GOT.

[Knife-28]

A Monument to All You Sins, I had only played through once on Normal before it and god damn it was hard, though surprisingly the supposedly hardest part of the campaign (The Mass Driver sequence on The Pillar Of Autumn) was a breeze, I only lived died twice.

 

[notsosavagemessiah]

iron boy for super meat boy, complete a full chapter without dying. try it.

 

[DuctTapeJedi]

The one in Fallout 3 "The Pitt," where you had to find all of the metal ingots.

Took ages...

 

[Tinbust]

I got to give it up to cod 4 on veteran. Those last two levels were designed by SATAN!

 

[xmbts]

Little Rocket Man from HL2 ep.2

So tedious.

 

[Kadoodle]

If I ever get it, the Platinum for Brotherhood.

Because the fucking trophies are glitching for me, and many others.

You could use a guide.

 

[LinkSwitch]

Definitely the Hardcore mode on Fallout: NV

Doesn't really add much difficulty when compared to the normal highest difficulty level, but makes the game a bit of a chore, thus hard to get through without going insane. Feels kind of like playing a first person version of The Sims...

 

[JoeBattisti]

Beating all campaigns on Expert difficulty on Left 4 Dead.

 

[Redlin5_v1legacy]

In terms of gaming, a few things I've done were a bit hard. I once did a personal challenge and beat Classic mode for SSBM on the hardest setting.[footnote]I'm drunk right now, don't ask me to recall what the setting is called. Happy New Year! *hic*[/footnote] I also 100% completed Super Mario World (but was an idiot and somehow got that file deleted >:/) and got that mini-game in Super Mario RPG. I set some pretty badass records on my copy of F-Zero too.

In terms of this site? That Mudkip badge was hard to get.

 

[atled3]

A Monument to All You Sins, I had only played through once on Normal before it and god damn it was hard, though surprisingly the supposedly hardest part of the campaign (The Mass Driver sequence on The Pillar Of Autumn) was a breeze, I only lived died twice.

I got that achievement on my first play through.
Several CoD WaW achievements were pretty damn hard completing the game on veteran took me longer than it took me to beat reach on legendary and as I mentioned i did that on my first play through which was't the case with WaW, also the sum of all zeroes and relentless achievements were surprisingly difficult even on the lower difficulty's.

 

[Cogwheel]

Don't often bother with achievements, myself.

That said, the skill point in Ratchet&Clank 2 for beating the Impossible Challenge (60 waves of enemies, plus environmental hazards, with no ammo or health pickups, followed by a boss fight) was rather tricky. The challenge in itself is eventually easy, mind you, but I insisted on beating all but the boss (which remains out of range) with the wrench. Tricky.

Also, Perfect Cherry Blossom on Lunatic with no bombs (personal challenge) and no continues. My god.

 

[s0nic_al]

What have you got to prove. Or something like that from Left 4 Dead.

Complete all 4 campaigns on expert.

 

[Jaidenator]

Halo 3 on legendary, it's the only one that comes to mind.

 

[you rolled a one]

geting every achievement in Civ five was my crowning glory =)

 

[Dr.Panties]

"Tactical Challenges"- complete all tactical challenges in Vanquish.

This...is just brutal, but so much fun. Challenges 4 and 6 are nasty. If you are bored, perhaps finding modern gaming just a bit too easy, you need Vanquish in your life. Thanks to this game, not only am I a better gamer, I have also dropped a third testicle and sprouted a massive glossy mustache.

 

[Zach Steadman]

Platinum for Assassin's Creed II. The fucking feathers were hard as shit to find.

Oh god..... the feathers. THe f*&king feathers.... It's like 'nam all over again.

 

[sp86]

Pt On Prototype. One of my prouder gaming moments.

 

[ShadowDude112]

iron boy for super meat boy, complete a full chapter without dying. try it.

You didn't just play the Forest? The only level I had trouble on was 1-20 but I got the hang of it.