lvl30.com: "Tower defense games differ from your typical strategy games. In these type of games enemies follow a set path through a gauntlet of units trying to destroy them before they reach their goal. The player sets up stationary units that have a variety of abilities, such as close range and high damage or units that attack multiple targets. In tower offense games, the player takes the role of the units that are running the gauntlet using whatever abilities they have to survive the ensuing onslaught. Anomaly: Warzone Earth is a tower offense game in which the player takes on the role of a commander. This commander is in charge of supporting his (or her) convoy to make sure they succeed in their mission."