Scientist X has spread a zombie virus around the world by using a powerful cube he invented. Five scientists that opposed his plan have divided the cube into five pieces and scattered them across the world. In retaliation, Scientist X has sent his zombie horde out to look for the missing pieces. As part of the Secret Delivery Agency, you must protect the guardians of the cube pieces from the zombies climbing up and into their skyscraper locations.
Source: N4G PC Throw Anything review – ChristCenteredGamer