How to get the "What Does This Button Do Achievement" in Gears 3

[fatwoody85]

I suggest outpost as the map because of the location of the silverback and ramp leading up

[fhw4979]

doesn't it take much longer on casual?

[sniperfire4u]

Nice job.

[ShadowoftheSeventh]

pimp guns

[craigums]

@AKBeazBoi have you leveled up your barriers to level 7

[IXSocrates]

@AKBeazBoi derp

[JOKACRAZY25]

HAHAHAHA, everone on Sera is right-handed!! LOLOLOLOL

[BrKT85]

This is crazy. I leveled up to level 3 just to find out you also have to spend another 10,000 to get the rocket launchers.