7 Days To Die is an excellent open-world zombie survival ... However, the game also has a tower defense style mode baked into the game, in the form of the Blood Moon. Every 7 days at midnight ...

NFD Engine 4 is a strong building in a great location, with a bell tower for ranged attacks during Blood Moons. Books are very important in 7 Days To Die, but these are the most useful out of all ...