What's the Most annoying mission you ever had to finish in any game?

Kingdom Hearts 358/2 Days:
Challenge Missions/Mission 66:Restore the town's Heartless.PS:FINISH IN RECORD TIME!AND GET THE BEST RANK [3 Silver Sigils]!That Boss takes so much time to kill!Aarghh!I won the mission,though.AFTER 2 MONTHS! D:<

 

I once spend 2 hours to a Layton-puzzle...
Puzzle 137 (diabolical box), Chelmeys route.
Well... that's stupid of me! I had to google it before I lost so many usefull time!

 

The last puzzle at the top of the tower at the end of the game on the first Professor Layton which was more like maths than fun >: (
The Professor telling Luke to be a gentlemen when you touch certain parts of the portrait afterwards more than made up for it though

 

maths = fun!!

 

beating the hardest boss in the game especially bowser

 

Beating a Boss in a RPG just to find out he/she/it isn't the real boss and having to fight he/she/it without a rest

 

Oh damn I had a good one but I forgot...


Oh yeah
The End bit on S.T.A.L.K.E.R SoC.... Bloody portals >.> I still havn't finished it T.T

 

the one in gta3 where you have to collect a few cars. they are scattered all over the map and you get some stupid time limit thats only possible if you do full speed without crashing

 

RHYTHM PARADISE!!

 

Escort missions where the escorted NPC has super low stats & you fail the mission because the NPC unit has poorly programmed A.I.

 

phantasy star 0 eternal tower :S Im playing it even right noe I couldnt beat it even nw :S

 

I remember a specific mission
There's a stage in SRWOG2 where you have to defend the Shirogane
Since in that stage you have no control over it,you can't select "Defend" when its under attack and you can't use the pilot's spirit to heal it.
I can't beat that stage on EX Hard mode,curses.

 

I can think of a few:
In kingdom hearts 358/2 days,the sneaking missions are really annoying.
Chapter 11 in ff xii :
chrono trigger and that mechanical dragon in prison,on hard mode
And finally those really annoying flight missions in lunar knights

 

Mission where you have to fight a hopeless boss fight.
Sure it's for story purpose that you lose, but I want to win goddamit !

Also, a mission that requires you to get random loot from enemies.
Luck based.

 

A mission given to me by God... get to level 53 on Pacman <.<'

 

It was in GTA, dun remember which one though... Drive a car through the whole island without damaging it, it was sooooo boring -.- And I also had to watch out for those idiot drivers there...

 

Reaching lv 200 on maplestory .. im on 98!