Left For Dead Game Add On Question

I downloaded the crash course campain(sorry for spelling been up all night) and want the sacarfice(again sorry for spelling errors).

The question is are they both co-op offline like the rest of the game and are they worth it?

I believe they are both off-line because I think the wife and I played them. I'm fairly sure sacrifice is definitley off-line as on-line but not so sure with Crash Course as I downloaded it after getting LFD 2.

As for if they are worth it, Crash Course was ok and it had a few more checkpoints as a normal map but just felt like a new level really so not sure about Crash Course.

As for the Sacrifice I definitley recommend it because not only do you get a new campaign map but also a new scavange map. It also adds depth to the story of the first survivors and new survivors and is quite an enjoyable map even if the campaign is quite short. I would definitley recommend this one.

Hope this helps but like I said I am a 100% sure Sacrifice can be off line and about 95% sure about Crash Course being off-line also...

yea, u can play them offline.

Ok thanks for the help.