Your Most Common and Rarest Achievement or Trophy According To GB

Yes, I have seen a thread which has your rarest achievement but I was wondering, what's your most common one too? My Rarest One is Auf Wiedersehen Petrovic in GTA4 by winning in all types of multiplayer matches for some reason. Not totally sure how not so many people have that considering how many people have the game, but what ever... My most common achievement is Get Them Out of Our Schools in Splosion Man with 99.6% of the people having this achievement.

Lol I have no rares, then again PS3 is the console I spend my time on.

"Juiced" from Blitz: The League, with 0.6%. Might have to do with the fact that nobody really played Blitz: The League. I think this like 3/435 people.
 
and
 
"Flow of Combat I" from Avatar: The Last Airbender, with 99.7%. 2015/2222.

I'd check but PS3 trophy support was taken off : (

Least common: Vesperia Master (Tales of Vesperia)
 
Most common: To Kill a Blackbird (Shadow Complex)

Most common is this.
 
And... oh hell, my rarest is this. For shame.

Most common:  Off The Boat - Complete the first mission. GTAIV

Most common - Flow Of Combat I from Avatar. Yes, I am a bastard like that, don't remind me.
 
Most rare- War Party from Far Cry 2. Win a competitive match with 16 players. Really? That is my rarest? That's...sad.

My rarest out of all my achievements is :
 
Got My Mind On My Money - Loot 25000 Gold in WoW  0.3% of people have it. (I was the second person to get it :) )
 
My rarest Xbox 360 achievement is :
 
Best of The Best - Achieve the rank of Elite in Rainbow Six Vegas 2.0% of people have it.
   My most common achievement is this, but I don't remember what it is and it's a trophy.

Most Rare: Slayer  
Most Common: Get Them Out of Our Schools

Most common: To Kill a Black Bird - Shadow Complex
Most rarest: Secret Saints Row Achievement
7.1% of my Achievements are rare.

Rarest is  Comback Kid  Game was Pure,  Come from last place on the last lap to win a race event in World Tour Mode.  I was actually the first person on the site to earn this achievement which is pretty cool.
 
Most Common is Get Them Out of Our Schools  'Splosion Man,  Eliminate 10 Scientists and stop them from spreading their filthy lies.

Rarest: http://www.giantbomb.com/achievements/hot-cross-fun/24699/     
Common:  http://www.giantbomb.com/achievements/get-them-out-of-our-schools/26926/ 
 
I think.. I don't own a 360, but I've played a friends several times

Rarest
 

Lost Memories 25 points

Locate all missing radio tags. 2 comments

Red Faction: Guerrilla Nov. 14, 2009

Secret Achievement 20 points

Continue playing to unlock this secret achievement. 8 comments

Assassin's Creed Jan. 5, 2008

 
Rarest:
 
 

Brutus 0 points

Dethrone a friend from a global scoreboard. 0 comments

Audiosurf

Traversed World 2 10 points

Travel all the way across World 2. 0 comments

Braid Sept. 28, 2008

RARE

To Kill a Blackbird 15 points

Destroy the helicopter attacking the vice president 6 comments

Shadow Complex

I haven't put the privacy options off my xbox live account yet but my rarest achievement for my wow account, is "We had it all along (cough)" and 2.0% have it.

 
 Rarest :
 

Rarest is Supreme Defender in World of Warcraft, 2% of people have it.
 
Most common is To Kill a Blackbird in Shadow Complex, 99.5% of people have it.

Rarest is, surprisingly, TBoGT: Bear Fight in Grand Theft Auto IV, 1.8% of people have it.
 
Most common is Get Them Out of Our Schools in 'Splosion Man, 99.6% of people have it.

Most of my rares are from WoW.
 
 
Most common is To Kill a Blackbird.

Uhh, I guess my most uncommon is this... Don't judge me!
 
Most most common would be Get Them Out of Our Schools.

My rarest is Tournament Qualifier from Project Gotham Racing 3. Rather proud of earning that, even if it was a weaker field because the qualification required a DLC car.
 
Like so many others, my most common is Get Them Out of Our Schools from 'Splosion Man.

My Rarest is Unreal 3: Off to a good start. 1.0%
 
Most Common is Shadow Complex: To kill a blackbird 99.5%
 
I'm not particularly proud of either of them. I mean I played a game barley anyone played and I got achievement just for starting the game.

My rarest is 

 
    
The Gladiator (30 points)

Most common would be this, which is baffling on how 100% didn't get it.
My least common would be this, which leaves me baffled on how I did it.

Most rare: Mad Genius from Red Faction: Guerrilla (0.4%)
Most common: Get Them Out of Our Schools from Splosion Man (99.6%)

Rarest : 0.7% achieved "I Adore My 64"
 
I'm a little disappointed how Giant Bomb sorts rarity, because it's not the hardest achievement I've unlocked nor the one with the least people.  There are achievements in more obscure games which are way harder, but since few people are up to the challenge of even playing the game, they don't count.

Ok found out how to do it: 
 
My rarest Achievement is winning 50 Pillage matches in Overlord. .7% of people have it. 
My most common is completing the Animus tutorial in Assassin's Creed. 
 
The one I'm most proud of however is Treasure Trove from Lost Odyssey :D

Strangely, most rare is... "Big In Berlin" - Rock Band 1. ( 231/ 8821 - 2.6%)
Most common: "To Kill A Blackbird"  - Shadow Complex (8651/8691 - 99.5%)

" Rarest is  Comback Kid  Game was Pure,  Come from last place on the last lap to win a race event in World Tour Mode.  I was actually the first person on the site to earn this achievement which is pretty cool. "

" I'd check but PS3 trophy support was taken off : ( "

Most common: The Flow of Combat I from Avatar
 
I imagine pretty much anyone who plays this game can get a measly 10 hit combo... in fact, I don't know how this achievement isn't 100%! Coincidentally, my second most common is The Flow of Combat II!
 
Most rare: This secret achievement from the Prince of Persia Epilogue.
 
I think this one is "I only need a hand or twenty", which you get by dying 20 or less times in the Epilogue. I'm simply gonna guess that not a lot of people played the Epilogue, which is why this is rare. In fact, my three most rare are all from the Epilogue. If we go past these 3 inherently rarer DLC achievements, my most rare is Tournament Hot Shot from Top Spin 3.

My Rarest is actually a PS3 Game, (which I got INB4 PSN tell GB NO GO), called LittleBigPlanet: 
 
  100% Complete (100 points) 
Earn all LittleBigPlanet™ trophies to unlock this platinum trophy 
 
 
My most common one is of course this, just like a lot of people: 
 
  To Kill a Blackbird (15 points) 
Destroy the helicopter attacking the vice president  

Most Common - Traversed World 2 from Braid
Least Common - Hardcore from the Orange Box (getting 1000 kills in TF2)
 
I thought my rare one was surprising - I thought a lot of people on GiantBomb played the Orange Box

Mad genius from Red Faction Guerilla