Zomboard is a zombie survival and colony simulation game that features a roof system. You can build on rooftops, which provide certain advantages.
Survive
They are just too many. Research, advance technology, and level up your survivors to deal with the increasing variety and number of zombies.
Live
Build a safe haven for eating, sleeping, and resting. Secure food and resources to keep your colony alive and thriving. Establish a crafting chain to continuously support your frontline.