Currently, in zombies mode, the zombies cannot be defeated untill all but one player is eliminated.
Likewise, once one player is left, the game doesn't end until the zombies are defeated.
The problem with this though, is the end game becomes a slog.
As it is now, zombies must always outnumber the players. If players have more total troops than zombies, there is a 33% chance for zombies to start their turn with an absurdly huge wave, however many troops it take for zombies to outnumber. This can easily result in them drafting 300+ troops. This is fun when there's competition, but his doesn't make sense after players have been defeated and just makes ending the game grindy and frusterating as hell.
The only way to end the game and get the rewards is to attrition them until you get a large stack, and then wipe them out in a single turn. And if the turn timer is short? Well you're screwed!
This is not fun. If you have to beat the zombies to finish the game, the zombies should should be easy to wipe up once the game is basically over.
