I'm playing through the challenges of Brink and I am stumped on the Be More Objective two star mission. I've played solo and with another player multiple times and nothing. All of the other objectives were no problem to beat in one and two star. Has anyone beat it and found a good way to approach it?

You gotta get that charge planted right away, run to it straight away. I was surprised at how how good the AI was, Heavy and Medium gay held their ground while the lighter guys always tried to out flank me.

Go Medium and be quick quick quick. SMART is your friend and so are fast hitting Assault Rifles that are buffed like the Euston or even the Rhett.

Do them solo, it's really hard, but you get a lot better.

i had more problems with the hacking on that one. also tower defense 3 star is kind of a bitch, but doable 

hit your head against it for 2 hours and then you will win ='[

It's impossible, I hate this game so much. The challenges and the level where you have to keep the missile from going off are unfair and ridiculously hard. It's as if the game knows your every move and anticipates it. Also, have any of you had the case where beating Be More Objective in co-op did not count towards the achievement? Cause I beat the third level on co-op and the second one alone with another character and I got nothing. The lack of difficulty selection for the challenges is dumb 

@Gav47: I always plant ASAP and that's fine. I can even handle the repair portion pretty well. The toughest part is the hacking portion as the operative; the enemy spawn is right next to the place that you need to hack (in solo, at least) which makes it nearly impossible to hack. The A.I. are not smart, they're only really accurate. For some reason this only applies to the enemy A.I. cuz my teammates (again, in solo) are disgustingly retarded and unable to kill anything. My current approach to operative section is to clear the area next to the terminal that is needed to be hacked and I place the hacking device then hide behind the wall/cover. This got me through it once out of a large number of tries.

Use a low level character, rank 1 ideally.  That way all the AI will be rank 1 tier in intellegence and equipment - you wont see any turrets, flashbangs, or heavy weapons on the field. 

After that, just hustle as quickly as possible.  It may take a lot of attempts to actually seal the deal with a low-level character, but trying to do 'Be More Objective' with a rank 3 or greater character is a mistake.

Try the RockSteady AR for long range work and the Kross SMG for CQC.