What's your most favorite video game accomplishment?

It can be from any time, but try not to say 'I got this really hard achievement' -- make it count.
 
My favorite was when I took a day off a few summers ago and beat Super Mario World 100% without a guide. Still one of my favorite games ever.

Proving this guy wrong.

Beating Vergil as Vergil in DMC3 on normal difficulty. I think I did it in less than 3 or 4 minuets, but I know that I got an overall S after doing it.

Getting through the dream levels in Max Payne without a guide and within ten minutes in both instances. You've cleared the game, you know what I'm talking about.

Beating CoD4s campaign on veteran, then realizing I had had one of those intel bonuses on.

Beating the fourth screen of IWBTG.

Probably beating Call of Duty World at War on Vetern, and completeing Drabon Age Origins. The first because of perseverance through the utter BS Treyarch created, and the latter becasue i usually just get bored or give up, but the 60 or so hours was worth the time for once. 

Getting 1000 gamerscore in Call of Duty: 4. 

I feel like I'm wasting it, but I'll go with this...
 
The first time I beat the Maneater boss in Demon's Souls with my mage character.  For those who are uninformed, this boss is a giant, aggressive gargoyle that you fight on a narrow bridge.  Being Demon's Souls, you can fall off the side of this bridge, which Maneater's charge attack will force pretty often.  The best part is that just when you figure out a sound strategy to deal with him you hear a distant roar and then another life bar pops up on screen as a second Maneater boss comes charging at you.  Oh yeah, my character's defense was so weak that he one-hit killed me, too.

I did Elf's RSF 6 times.
 
go me

Completing Blazblue's ridiculous score attack mode.

Heh, I've just been talking about this without another GB member, but my greatest video game accomplishment was being ranked 5th in the world overall on Xbox Live in Sid Meier's Pirates! 
 
Also, getting 100% completion in Grand Theft Auto: Vice City without the use of codes is another accomplishment I feel really good about. 
 
Oh, and getting 100% in Tony Hawk's Pro Skater 3 twice, and being able to knock all out of the goals in each level in a single 2-minute run, which couldn't always be done because they move the placement of certain things, but I could still do it most of the time.
 
As for future accomplishments, right now I'm trying to get 100% in Banjo-Kazooie: Nuts & Bolts.

I was super proud of the time I beat the first Sly Cooper. I was in kind of a phase where I wasn't finishing games, so when I did that, I knew that I could indeed apply myself to a game again.

I would have to say beating all of the original L4D campaigns on expert without using any glitches and/or cheats. Took me a month!

Resident Evil 2. 
 Leon, Scenario A. 
 A Ranking.  
1 Hours 12 minutes. 
 
At the time (secondary school) I had no idea this was faster than the record by a full 9 minutes, and also had no way of recording it either :(

Finishing all agility orbs in Crackdown, without any guides. That was the best feeling ever, and that is sad.

Water Temple in Ocarina of time, and I guess some of the raid bosses in EQ back before Planes Of Power.

" Proving this guy wrong. "

I was with 3 friends online (So 4 of us total) playing Company of Heroes against 4 AI all on the highest difficulty. We'd been losing for the entire match, until they'd pushed us back to one bridge that funneled them DIRECTLY into our base if they managed to take it. The bridge was made of concrete so we couldn't blow it up (though we did do that with the other wooden bridges) so this was the final line of defence. They threw their tanks at us, and many of them managed to break through, but kept playing. After about 3 or 4 hours, I managed to get a US ranger group across there to sneak around and hide in a nearby house. When they sent their next line of tanks, my rangers blew them up and then my friends brought out their heavy tanks and we swept through the entire map and took every point within 5 minutes. Was incredibly satisfying.

Completing CoD4 on Veteran, especially the last level.

Launching the goddamn gnome into space!

Getting 100% in The Legend of Zelda: Phantom Hourglass, and yes that means every single STUPID ship part.

Finishing GTA3 in 100%. No guides, no anything and I received NOTHING in return.

Halo ODST:  Vidmaster Challenge Deja Vu 
Complete Highway on 4-player Legendary LIVE co-op, with Iron, and no 'Hog or Scorpion.  
 
It is not because it was an achievement, it is because it was a true test of cooperation and one of the most tense and rewarding gaming experiences I have ever had. You get to the little town at the end and you realize the worst is over and it's a truly amazing feeling.

" @Video_Game_King said:

" Proving this guy wrong. "

You do realize that this is 2010 right? I mean you can play whatever the fuck you want, its none of my business, but it's kinda sad that you're stuck in the past, always on about those old ass 80s games "

All the masks in Majora's Mask. It was quite an amazing feeling as a kid.

getting insanity on ME2 done and having blast doing it, getting to lvl 60 on ME1 (ME1>ME2, sorry i know ppl will think im wrong), getting the achievement for GTAIV under 40 hrs without aiming for it on the first go

My first 1 credit clear of dragon's lair at the arcade when I was a kid. 
There was a crowd of people around me while I played and I got a free pizza for being the first to clear it with one credit. 

" @Video_Game_King said:

" Proving this guy wrong. "

You do realize that this is 2010 right? I mean you can play whatever the fuck you want, its none of my business, but it's kinda sad that you're stuck in the past, always on about those old ass 80s games "

I finished Desert bus once... 
 
<_< 
 
 
>_> 
 
 
<_<

That's a tought one. I have a ton of gaming achievements that I'm really proud about. In recent memory, it was probably getting my final gold medallion in Mission mode for Ninja Gaiden 2 (the XBox 360 version). Took me a very long time and a lot of dedication to do, but when I finally finished mission mode in its entirety, I felt like a huge load was lifted off my shoulders.

Beat the first Splinter Cell without killing anyone, mostly prompted by reading in a magazine that it was possible. 
 
Also. Playing Oblivion on the hardest difficulty for a few weeks not understanding why the easiest enemies took 5 minutes to defeat. 
After lowering the difficulty the rest of the game was a cakewalk.

My gamerscore I guess. (Click my mini bio.)

hitting the 300 hour mark and getting all the achievements on oblivion

Literally doing everything in the last two elder scrolls (PC versions).

Getting the platinum trophy in Demon's Soul, inFamous and God Of War Collections. Completing Mass Effect 2 on Insanity, on my first play-through I should add. Also getting 1000 achievement points in Mass Effect 2 as-well