HOLY FUCK, the last section of the 10th mission on a Legendary solo run is fucking HARD, HARD HARD.
Maybe the only stuff I've played that is of harder difficulty is the ferris wheel section in modern warfare and that fucking terrible Gravemind level from Halo 3.
The very, very last section of level 10 made me want to throw my controller threw the tv screen. I'm sure it's proper fun on Heroic or something, but for me, it soured the whole level. It reminded me of the kind of cheap bullshit Epic was doing in parts of Gears 2, that "haha gotcha!" type stuff.
But whatever, the gamer points were well worth it.
Also, the game is graphically beautiful, beautiful lighting and textures. I'm gunna do another runthrough on a sane difficulty level and enjoy myself more.