Yes, it's really fucking hard, my first attempt, the game froze on day 4: 23: 50 something, I was really fucking pissed...

some of the hexic achievements are mindblowing

Frank the Pimp is much harder in my opinion.

"Frank the Pimp is much harder in my opinion.
"

mine froze day 4 at 11:55 pm. 5 mintue before i got 5 days and the laser sword

this achievment is easy its just who wants to leave that exspensive tv and xbox that you own on for 14 hours?

yea. 
70% of people aren't willing to do it.
30% get red rings (i joke)

( i have it though- blaster > sword)

My 360 froze when I tried it.  I haven't tried again yet.

( i have it though- blaster > sword)"

I have the achievement and I still consider it my greatest gaming moment ever. I made it to 4 and a half days, 5 and a half, 6 and about 20 hours, and one more time I made it to 6 and 22 hours. I was just going to shut the game off forever, but at that point I knew I could do it since I knew where everything was. Hoarded all that wine oj like a champ, and got a whopping 8 days and some hours. Totally cathartic moment. I had no idea that I would ever do something so ridiculous in a game.

I wouldn't even try. Don't have the patience nor the time.

Mega Congrats to everyone else.

I don't think it's the hardest achievement, but it one of the most tedious. It's not hard at all...especially when you know where the 3 Books for boosting the energy gotten from eating. Then it basically becomes a sit and wait achievement. Sit, wait...eat...wait...go get more food...repeat.

This achievement does seem like it's designed to make your system red ring lol.

My friend is actually trying it right now, I told him if he was successful and then did it for me as well I'd give him £20 lol

How do you start the achievement? Finish the game and a special game type unlocks? Or what?

I got to somewhere on Day 3, then I entered somewhere not expecting a boss and for destroyed. Haven't even considered trying it again.

"I wouldn't even try. Don't have the patience nor the time.

Mega Congrats to everyone else."

"How do you start the achievement? Finish the game and a special game type unlocks? Or what?"

The sword doesn't last long, eh?  Are there any books available which boost its durability? 

Also, I think some of the Guitar Hero achievements are a bit harder. 

"Demyx said:

"I wouldn't even try. Don't have the patience nor the time.

Mega Congrats to everyone else."

Same here, plus i didnt want to risk my Xbox on one achievement.
I did how ever try the Genocide achievmeent and after 3 and a half hours of driving a car back and forth through the service areas i had to stop before i went bat shit insane."

"The sword doesn't last long, eh?  Are there any books available which boost its durability? 

Also, I think some of the Guitar Hero achievements are a bit harder. "

"Sir_Ragnarok said:

"The sword doesn't last long, eh?  Are there any books available which boost its durability? 

Also, I think some of the Guitar Hero achievements are a bit harder. "

Its been a while so bear with me, but i am pretty sure that by the amusement park in the book store where you find the Japanese survivors theres a book on Serial Killer or something to that effect that boosts the durability of blades, there's 2 or 3 more books that you can pair  that will make it strong as hell. I remember somehting about 3 books and the mini chansaw getting me through a whole game with only a few breaking."

hell yeah man, bit the taste out of that crazy Vietnam vet in seconds.

Ugh, more like the most ridiculous achievement ever.  The actual 7-day surviving thing is fine.  But not being able to save during it is just - no.  I'm not playing until day 5 just so my Xbox freezes.  Or pausing and leaving my Xbox on overnight so I can overheat the thing and try and go for the "The Red Ring" achievement.  I wanted to play this mode just for the fun of it, not the achievement.  But there is no way in Hell I'm going to sacrifice my Xbox because some idiot thought it'd be an awesome design choice to disable saving and force you to leave your Xbox on for what is it, 14-16 hours?  No thanks.

Can't say that I've played Dead Rising.  Never looked appealing to me.  However, given that this "achievement" is claimed to be fucking retarded difficult, then I think I will be picking this game up soon to accomplish the nearly-impossible.

"Can't say that I've played Dead Rising.  Never looked appealing to me.  However, given that this "achievement" is claimed to be fucking retarded difficult, then I think I will be picking this game up soon to accomplish the nearly-impossible."

I tried Infinity Mode a grand total of one time. I got out onto the rooftop and saw Otis, this made me smile, as I was not expecting it. "Odd," I thought "wonder what he's doing out here." He then ran up to me with a frying pan and attacked me. I beat him to death with my bare hands and immediately turned the game off when a box appeared and exploded into a shower of random items.

The "hardest" achievement (that I'm still working on. Once I get the achievement, I'll basically be able to run through the last achievement for a 1000. My achievements for the game. ) for me is probably this one:
 
       Dream Mode - all cleared (80 points)
Save the game after clearing all Dream Mode scenarios.
 
From Warriors Orochi 2.
 
Mainly because of one Dream Mode required you to have a total of 2,720 proficiency between all of the characters. Each character maxes out at 50 proficiency. There are 94 characters. It takes five generals/lieutenants/captains (whatever) to get one level of proficiency, or it takes five hundred normal soldiers.
 
You get about five proficiency on the map Wu 4, and it takes roughly 1'45" to run through. So, at top efficiency, let's say it takes you 15 seconds to load the map up again and run again. That's two minutes for five proficiency (so, ten minutes to max out one character).
 
Let's do the math, there: 2720/(5/2) = 1088 minutes. That's a total of 18.133~ straight hours. However, in order to do that you have to have a skill called Almighty on your weapon, which takes anywhere from two to twenty minutes to get one of (you have to produce it through combining weapons.) depending on your luck.
 
It's not hard in the sense that you'll lose a lot, but in the sense that it takes a lot of time and grinding and reloading the same map over and over and over.
 
There's a similar achievement in Dynasty Warriors 6 (I think it's all characters to max level.).

I sat there with a pizza and a bottle of jack and got the achievment.

not even close. If you do it right you only have to be at your console every so often. It just takes time.
 
if you use 
http://www.youtube.com/watch?v=_048JBkFMgI&feature=related
 
that guys videos and/or this guide  

http://newcenstein.com/non-confrontational.html
 
 there is no excuse for not getting it if you try and your console doesn't freeze

" I wouldn't even try. Don't have the patience nor the time.Mega Congrats to everyone else. "

Planning to do this tomorrow.  =D