Zombie Harvester Rush
Your family ranch is invaded by hundreds of zombies! Take the wheel of your combine harvester and drive as long as possible by grinding as many undead as you can on while listening some country music. Be careful not to overheat your machine if you want to travel a long distance. These "zombies cleaning" missions will bring you money that you can invest in improvements for your machines. Dozens of vehicles can also be bought, more and more expensive but also increasingly rare.