The main objective in Zombie Highway 2 is to drive as far as possible while surviving waves of zombies. Players need to navigate obstacles and collect items that can enhance their vehicle or help fend off zombies.

To upgrade your vehicle, earn in-game currency by completing levels, then access the garage. Here, you can purchase upgrades like armor, speed enhancements, and weaponry to improve your chances against zombies.

In Zombie Highway 2, players can choose various weapons including pistols, shotguns, and machine guns. Each weapon has unique attributes such as damage output and firing rate, which can be selected in the garage before a mission.

New vehicles can be unlocked by completing specific missions or achieving certain milestones during gameplay. Look out for challenges that mention vehicle rewards, and make sure to meet the requirements to gain access to them.

Yes, Zombie Highway 2 can be played offline. However, certain features such as daily rewards or multiplayer options may require an internet connection to access. Enjoy the core gameplay experience anytime without needing to be online.