Local co-op for all achievements?

[L4D II JoK3r]

Is it possible to get all the multiplayer and co-op achievements done in local or do some of them have to be done online?

Thanks

[Direkin]

I think it can be done locally. I'll have to give this a try as I still have 2 multiplayer achievements to get, and I see there's DLC now as well.

[Kunduz]

You should be able to obtain all but one: The achievement you need to invite a friend into a game of deniable ops/co-op.

[L4D II JoK3r]

Yeah by the way that people are complaining about the quality of the connection through Xbox live I think I'll rope in a friend for some good old split screen.