State of survival

State of survival is a team of heroes trying to survive in a world full of zombies. The zombie apocalypse has been a year since it happened. You are going to recover civilization. Find the survivors, enlarge your squad, build a safe shelter and defend walking dead. You will need resources to upgrade your base and items. The investigation should find a vaccine for the zombie virus. Excellent graphics and sound, many heroes, and zombies, and friends.