Anomaly: Warzone Earth

Anomaly: Warzone Earth is a real-time strategy tower defense video game by 11 bit studios. Players control a convoy of vehicles investigating anomalies around sections of a downed alien spacecraft, which are protected by various types of defensive towers that have to be destroyed. Players do not directly control the vehicles in the convoy, rather they set paths for the convoy to follow along city streets, while also dropping power-ups to aid the survival of the convoy. (wikipedia.org)