Kingdom Rush: Origins, the latest installment in the Kingdom Rush series of games, is now available on iPhone and iPad. The tower defense game adds new locations, new troops, and of course, new towers. As the name suggests, Origins takes place before the events of the first two games.

As in past games in the series, you place towers along the path to the end of the level, hoping to stop the advancement of enemy troops before they can deplete your health. Origins includes the new Elf race and its attendant troop types, along with 30 new enemy types. There are eight new specialized tower upgrades, and more than 18 new abilities. The game includes nine heroes, though most of them are in-app purchases.

You can get Kingdom Rush: Origins and Origins HD from the App Store right now.