The most annoying boss

[Raptor]

The ****ing juggernauts of Modern Warfare 2 ranks pretty highly for me.

They are these huge guys wearing EOD bomb-resistant vests and charging at you with a machine gun. They have so much armor that they don't bother taking cover, and their lives' mission is to run right up to your face and fill you up with bullets. Not a huge problem if you have a .50 cal, since 3-5 well placed shots kill them, but on the mission High Explosive, where you can only use explosives, they are a pain in the ass. They go through 10 claymore mines and still walk and fire at you. And you have up to 3 of those monsters simultaneously running and spray bullets at you.

[Cyvaris]

If I have not mentioned it before, Miltank, Whitney, Goldenrod gym, END OF STORY.

Though Barrett in Deus Ex:Human Revolution DEFIANTLY comes close. Jesus Christ that boss battle is a brick wall and a half! WHY CAN HE SEE THROUGH MY STEALTH!!!!

[Human No More]

Barrett is hard...

Spoiler: until... 

...until you work out the pattern he fires in, then throw barrels at him between it. Explosive barrels do some good damage, but I think the gas barrels are actually better, as when they stun him, just fire a clip into his head - you should only need to do this twice. EMP grenades also stun him. Also, make sure you get the stim from the medbay just before you fight him

Still took me quite a few tries though.

[Advent]

Not actually a boss, but the final part of Black, the underground bunker, is hard as ****. Almost every single guy has a M249 or SPAS12, and there are these other guys with riot shields and 44. Magnums. And you are completely on your own.

Took me ages to finish on hard difficulty.

[Fkeu'itan]

MGS3.

European Extreme difficulty.

The WHOLE GAME is a boss.

[Cyvaris]

Originally Posted by Human No More

Barrett is hard...

Spoiler: until... 

...until you work out the pattern he fires in, then throw barrels at him between it. Explosive barrels do some good damage, but I think the gas barrels are actually better, as when they stun him, just fire a clip into his head - you should only need to do this twice. EMP grenades also stun him. Also, make sure you get the stim from the medbay just before you fight him

Still took me quite a few tries though.

Yeah I figured that all out pretty quick. The real problem I had is this is the first real action game I am playing using a PC. My reflexes are utter garbage. On a console I...probably wouldn't have been much better. I suck at shooters. Oh well the other bosses where much easier.