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DomiNations has received a new, free update, developer Big Huge Games has announced.

The new update – called Oil Boom – contains a new resource to mine for: oil! Players can build wells and refineries to collect and store the resource, which can be used to purchase grunts.

The update also contains new tactical units: sneaky Guerrillas (sadly not gorillas), and offensive Gatling Guns.

You can grab DomiNations, including the new Oil Boom update, for free now on the App Store and Google Play.