Grandpa is eager for adventure again! Survive in a harsh zombie world. This time, Grandpa has to save the world from evil zombies. Zombies can drive and shoot! And Grandpa can destroy evil spirits! Fight the most dangerous mutants. Buy cool guns, find unique attachments, assemble your own unique gun and go into battle! Many locations, go through the whole world, from hot deserts to sea battles! Features: - Unique weapon assembly system. You can create a unique gun, install...