Prez wrote on Aug 2, 2010, 13:59:
Bear in mind I've only owned the game for 2 full days, but afaik, yes, you can stay logged out of Bnet. I actually have 2 campaigns going. One, I connect to Bnet as a sort of a test of how the system works. I have a pretty stable connection and still I've lost connection to Bnet 4 times over a span of 8 hours or so. All that happens is a message comes up saying that you will no longer earn achievements and that the game will only save locally. For the other campaign I have never connected to Bnet again beyond the initial activation.
The biggest downside is that once offline, only the guest campaign can be continued. Any game started on Bnet can only be played on Bnet. Just play as a guest (you can have up to 3 campaigns going at once it looks like) all the time and you'll never have a problem.
You're half right. You can actually play your B.Net campaign offline, as you've already noticed when you lost connection mid-game (and to offer a counterpoint, I've put in nearly 20 hours on the campaign and haven't lost connection yet).
All you need to do is check "Remember Account" on the login, it'll save your account credentials. Block SC2 with your firewall/unplug the router/whatever to test it and load up SC2. It'll offer to take you to your offline profile, where all your saves are available.