Very good, time consuming. You can play without spending any money. Patience is required. What could be the best for this game is crossover with other zombie games. Walking Dead is a good start. It could be better to include Resident Evil or any characters from other zombie games. Another is that resources should be available for all teams. For example, most refinery gas nodes has been seized by strong teams, what about those who wants to have their own team with their own resources?