Most Difficult Achievement To Obtain.

[Kelethor]

Man VS Tank on left four dead, along with crowned

 

[rainman2203]

Brass Balls on Bioshock. Brutally frustrating. Big Daddies blow. Alliteration ftw!

 

[Blind0bserver]

I believe for the 360 version of Mirror's Edge there is an achievement called "Test of Faith". To get it you have to beat the game without firing a single shot from a gun. It is possible, but after thinking back to levels like the Boat and The Shard I can't help but think it would be pretty damn difficult to get.

 

[Corven]

For me, Legendary Champion in street fighter 4, you have to finish the arcade mode on the hardest difficulty, and then defeat gouken, which means you have to fulfill the requirements to face gouken in the first place, 2 perfect rounds, and finishing 3 rounds with an Ultra-combo finish, I don't think I will ever do it.

 

[TheTygerfire]

Any PREY multiplayer achievement...seriously good luck trying to get one of them these days.

 

[Slayer_2]

Seriously 2.0 Gears of War 2

 

[SharPhoe]

I wanna be the guy on Impossible.

This should totally be an achievement worth infinite points, since it'll never happen.

 

[Flying-Emu]

7 DAY SURVIVOR DEAD RISING
WITHOUT A DOUBT

PLAY FOR 14 HOURS STRAIGHT
WITHOUT DYING WITHOUT A GRADUAL HEALTH DEGRADE!

No caps, please.

Also, you just have to powernap. Stock up on food, sleep for about 5 minutes with your character on the roof, wake up and feed him, etc.

 

[GyroCaptain]

The 53000 kills acheivements in Dead rising and L4D

Dead Rising one is easy. So is Left 4 Dead, it just takes longer.

Yep, I've got the Dead Rising one. You basically just get to around level 50 and path a triangle between cars in the parking garage in such a way that one dies as you get to the next. It takes about 4 hours.

 

[The Shade]

I agree with OP. 'Neighbourhood Defense' is freakin' evil.

A lot of the other TF2 achievements are pretty dire, too.

Little Rocket Man is proving to be a ***** as well. Working on it now. He keeps falling out of the car!!!

Also, I'm currently working on: Brass Balls (Bioshock) Complete the game on hard with Vita-Chambres off. Not THAT difficult, just time consuming.

The final achievement on Mass Effect. Complete the game on the Insanity (or whatever the highest level is called) setting. So far it's been pretty easy.

 

[Twilight_guy]

Little rocket man.

trying to carry a garden gnome several miles through Half-Life 2 Episode 2 while being chased by a helicopter gunship is HELL!

You can leave the gnome behind when the gunship first starts chasing you. Then, when you reach the next area (after the loading screen), you can throw it in reverse and grab the gnome before driving back. The gunship will be gone in the first area (although it will be waiting in the next area). You could also take down the gunship by launching mines at it early on, but it only drops them if your not slowed down, and you have to slow down to grab them so its catch 22.

The hardest achievement that I've seen yet is the neighborhood watch achievement in HL2:E2. I have a horrid aim with those dang bombs and I almost always miss. The first time I beat that last strider part was on easy, and I still only manage to just barely kill the striders as they were only a few hundred feet from the silo(after losing several times). Beating them before they destroy any buildings is impossible for me.

 

[necrons_2]

Little rocket man.

trying to carry a garden gnome several miles through Half-Life 2 Episode 2 while being chased by a helicopter gunship is HELL!

I concur that took me at least a week playing it on/off

 

[Captain Spectacular]

Beating L4D on expert, I have never even come close with the computer teammates and never played with anyone who wanted to.

 

[Garmana]

The 53000 kills acheivements in Dead rising and L4D

Dead Rising one is easy. So is Left 4 Dead, it just takes longer.

Yep, I've got the Dead Rising one. You basically just get to around level 50 and path a triangle between cars in the parking garage in such a way that one dies as you get to the next. It takes about 4 hours.

Yup. That's about the same as what I did.

 

[51gunner]

I wanna be the guy on Impossible.

This should totally be an achievement worth infinite points, since it'll never happen.

I said it earlier in the thread: one guy has gotten all the way past the seventh boss and was quite a way into the guy's fortress.

I didn't find Brass Balls all that hard. I didn't have any problems in Bioshock, actually.

 

[Antiparticle]

I'm currently at 9/10 sentry kills in one life with an engineer in TF2.

Kill 1 person, no one cares
Kill 2 people, someone will tell the rest of the team there's a sentry where you put it
Kill 3 people, their team will coordinate it's demise

Killing 10 in one life is just nonsense, at least if you want to farm achievements the proper way; with no modded levels or goofy rules.

Mwuah, I got that one fairly quickly. It's definitely possible if you put the sentry in an unusual place, guard it well, and have a team which looks out for you a bit. And I guess you need some luck too, for instance a lot of new people joining the game who don't expect your sentry. But it's definitely doable.

Seriously 2.0 Gears of War 2

Tell me about it. I have now accumulated 4.000 kills... so only 96.000 more to go...
Actually I hear there's a semi-easy way to get this achievement, there's a part in the single player campaign where you can kill a lot of creatures very quickly, so if you just repeat that segment over and over again you can get it in a couple of hours or so... but I want to get it the fair way. I'll just be playing GoW2 one day (in 2013 or so) and suddenly see "Achievement unlocked: Seriously 2.0" appear, I'm already looking forward to it!

 

[bmf185]

Stay off the sand. I swear my pinky toe would touch a grain of sand every time I tried to get it.

I got this without even knowing it existed. Pleasant surprise.

Probably the 'What are you trying to prove?' one from Left 4 Dead. All campaigns on Expert? Yeah, right.

 

[ProfessorLayton]

Little rocket man.

trying to carry a garden gnome several miles through Half-Life 2 Episode 2 while being chased by a helicopter gunship is HELL!

This is the most evil thing in the world. I couldn't even find the gnome to begin with!!

 

[The Cheezy One]

Got the Mile High Club achievement yesterday.
After shooting the hostage TWICE, I finally made it.

man that must blow
at some point i was running towards the door whe i was shot in the back :'(
got it eventually
that and no fighting in the war room are the hardest ive done, but they are still pretty basic. just shoot stuff

I got all of them on COD4. I think bragging rights are deserved when you get them. *pats self on back*

oh yeah! 1000gs!