It would be cool to be able to buy a few days of dormancy; it's fun to create things that exist in different parts of the world and let 'em rip. I haven't "beaten" this game yet but have created some fun pestilences. My first, called Shartsplatz, was a waterborne bacteria that caused diarrhea and wiped out everyone except Madagascar (of course) and Australia. Must be the booze that made the Aussies immune. I added rodents and insects as means of transmission. Big ole yuck-fest. Had one start in China. It went to all the other BRIC nations and Cuba first, then trashed Africa and Europe, leaving the western hemisphere alone. Hmm. Nauto's right. A nice, robust northern bug's the way to do the planet in; Greenland rocks! Who knew? :-) Oh, one suggestion: a border lock-down should NOT be 100% effective. I mean, come on. The US has NAFTA, the South Pacific has smugglers and pirates.... One dope smuggler with a cough and the runs is STILL a vector. :-)
Some observations:
- Keep your logistical lines meshed. Build enough depots (they only cost you a nug) to resupply key defenses from multiple points. This mitigates some of the wandering nugs as well.
- In Berlin, resist the temptation to go after the wide bridge first. The wide bridge means that the zombies are spread out and you can have more wall segments to absorb them... and more sniper towers to take them out.
- The point of greatest danger (after the early game when you're gaining a foothold) is the end game. The hordes are concentrated. The snipers just don't have a high enough rate of fire to take them out, so try to attrit them with a yielding defense.
- If you're overrun, consider abandoning your next line of defense to give them a chance to spread out. Never weaken defenses in territory that you control; it's nearly impossible to win a pitched battle against a concentrated horde.
Happy butchering!