A designation given to a player at the start of a game after each rolls a die and adds their army's aggression factor. The side with the higher adjusted score is the invader, the other is the defender. Used to determine terrain features, time of day or night, weather, and deployment and should have no impact on how each player actually fights the battle. [page 12
Invader is a street artist who pastes up characters from and inspired by the Space Invaders game, made up of small coloured square tiles. He does this in cities across the world, then documents this as an "Invasion", with maps of where to find each invader.