The first five were easy, came within the first couple of rounds from gameplay. Got several later on that I wasn't even trying for also from gameplay.
I did farm the heck out of the Death Metal achievement though ("gather 10k metal from destroyed buildings"). Was too tempting , too fast, and too easy to build everything outside spawn, blow one up, pick up metal, shoot the shotgun, blow up the next, pick it up, shoot the shotgun, etc, rinse, repeat.
And I'll probably farm the Texas Ranger one ("move buildings 1 km total"). Incidently, I think taking buildings through teleporters works for that one, though I'm not sure.
Kep