We played the Zombie haunt (21) last night and found a hitch. The rules say the Heros win if they
...kill the zombie lord or all the zombies...
I went on an axe murdering spree and nailed all but one of the zombies before dying (such a good game!)
But at as my sole other companion ran the spear through the last zombie (with the zombie lord in the next room over!) and declared we had one, the traitor cried foul. They said that the zombie lord was a zombie, and 'Killing all the Zombies' meant they had to be vanquished too.
We argued that if the zombie lord had to be killed regardless it would have simply said 'Kill the Zombie Lord'. Eventually they relented.
What is the logic behind not having to kill the zombie lord? Was our decision right?