In version 2:
The combat uses dice which introduce the element of random.
Reward system is changed for the better called combo gold.
The heroes now share their hit points.
The heroes also share action point to do their actions.
This time around the zombie is now a zombie warrior, they will attack the house if there is no hero present in the room they occupied.
and hopefully this one is more streamline than the previous one.
You can download the game below
Horde of the Dead version 2
Horde of the Dead version 2.1 (Spanish)