Mantic Games - Mars Attacks Whacky World War

Mantic Games announced the Whacky World War expansion for Mars Attacks:

Mars Attacks: World War represents the next stage in Mars Attacks play and gives you a system of rules to play out that next step. Instead of prescriptive scenarios and set force lists, these rules take Mars Attacks closer to a tabletop wargame.
Whether you have played these kinds of games before, or this is your first time, this book will ease you through the process, introducing new concepts which will expand your games to reflect the wider conflict.

Link: Mantic Games