An open world game the size of GTA: San Andreas but the world is filled with zombies. The game would allow you to team up with 7 others bringing the total to 8 player co-op online. Playable characters would be highly customizable, from clothes to facial features like in Oblivion. There would be many weapons that feel very different from each other like Dead Rising. You can go on missions to reach a climax to the story or you can go on side quests that involve finding and helping survivors or eliminating psychopathic humans. Think Dead Rising: San Andreas. With fast AND slow zombies. And there would be downloadable content such as additional cities, weapons, and vehicles.