GeoDefense Swarm genre tower defense
geoDefense Swarm is a tower defense game by American studio Critical Thought Games available for the iOS and Windows Phone devices. Released on September 14, 2009, it is a sequel to geoDefense,  released by Critical Thought Games in 2008.Gameplay
Over 7 defense tower types can be purchased by dragging and dropping them onto the map. Amount of dollars earned are dependent on which enemies are destroyed. Later levels include the new addition of vortex towers that can be linked to defense towers that increase damage.
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