From Zombies-wiki

What is it ?

Zombies is a real-time strategy (RTS) game with unique features and an exciting game play. You slip into the role of a (mostly) evil lesser god with the aim for power. To accomplish your evil task, you will suppress your servants and destroy your enemies. With your power increasing, mighty champions will offer their services in order to satisfy their greed for wealth and lust for tormentation. As manifestation of your cursed divinity on earth, your champion will lead your armies of zombies and other fearsome undead creatures. But be careful: as you gain strength, they will become more powerful themselves and eventually reveal their real ambitions ...

More Background

In zombies, you control a lesser god, who feeds his entity from belief, throngs of zombies and terror. Unfortunately, the higher gods have denied you the possiblity to act directly on the world. But you have found a way to manifest your will through creatures with an extreme affinity to your evilness. These evil champions will receive your commands as diabolic suggestions. They will lead your brainless armies or misguide the human villagers to wars against your enemies, the other gods.

Features

This game is a classic RTS oriented at well established games of this genre. Despite this, Zombies offers some exciting game features:

• Genuine unique story and game background
• Almost unlimited number of units
• Control multiple evil champions each with a set of unique features
• Suppress villages in order to gain more power and belief
• Fight against 2-32 human players or computer AI enemies
• Random events: from time to time, world events may occur, such as human rebellion, organized crusades of the 'good' higher gods, earthquakes etc.