when attempting multiplayer I always get: "Connecting to Server...
Connecting..
Security Error: Couldn't get permission to connect to server."
Ive done everything I can think of to remedy it, including making sure cookies accepted and still nada, decent campaign levels, could use more of them and more upgrades/untis. Nice 1st game, could make a great series with a few adjustments.
On my comp it took from 8:30 till almost 2am to get through 60 levels last night, the earlier games were slow, but thats just sillky, please add a quality adjuster as it does help somewhat.
the timer on the cities needs to be longer, often I'll have zombies still running around trying to get more infected and it just ends. 1st town hasnt lasted more than 3 seconds...
quicktip: upgrade prices are not cumulative, you're often better off just saving a little more to get the next level of the upgrade, it will cost les sin the long run.