There is an updated version of this map which is much better than this version. It features better difficulties, better terrain, more units, more zombies and more however it was protected and stopped working due to the return bug. I received the help of someone to fix the return bug within this map. I then made:
Altered Zombie Spawn to match Difficulty
Implemented triggers to set limits to duration of games (sometimes game lasted hours).
Redesigned spread of zombie virus to ensure a climactic ending.
Made items affordable and more effective, making them a viable strategy
Once a map is deprotected, only someone with jass knowledge can implement any major changes. I did what I could in GUI to make changes. My goal was to make the map playable and bring it up to standard. There are no overpowered spells, drops in game difficulty, major game-play changes or cheats within this mod. There was still lots of work to be done such as improving the AI of zombies, forming of swarms and improved boss sieges on higher difficulties, however I stopped development. The map is protected as the original creator protected his map. I don't intend on unprotecting his map for anyone.