Purify the world, purify the world around you, survive in a polluted and devastated world. You must survive in a world of devastation and zombies roaming the streets. You must collect and study the zombies' DNA, clean the surface contaminated with the. vaccine you created and work with the few friends who are still alive to survive! 26, 2024Minor bug fixes and improvements. Install or update to the latest version to check it out! show more