Brutal...

[Antonius]

Has anyone beat the whole campaign on Brutal yet? I just beat the campaign on hard and finished all of the hard achievements. I'm wondering if beating it on brutal unlocks a secret ending or anything like that.

[0mar]

Beating all 29 missions gives you uninfested Kerrigan avatar.

[SuperKiller]

i beat it on brutal, no secret ending

[Hydropillow]

You get the Campaign Ace medal in your profile summary... + kerr avatar ye
And ofcourse, mass achievement points ^^