So could all achievements be done in online or local if not specified?

[MR X 93]

Basically wat I'm askin is can I set up 2 controllers and boost for the achievements. Not that I'll do so for all the achievements, but maybe a few

[T0b3]

Yes. That's correct. Online achievements are descripted specifically.

[bigsilentrob]

I believe the only achievement that has to be done online is one in Scrabble (World Wide Web). All others can be boosted with a 2nd controller.