XCOM: Enemy Within, Firaxis Games’ turn-based strategy standalone expansion pack, today rolls out on the App Store, Google Play and Amazon AppStore to iOS, Android and Amazon Fire devices worldwide for $12.99 USD.

The Virtuos-developed mobile port features additional content including new gear, classes, maps and gameplay, such as:

New capability unlocks for XCOM’s soldiers via new base facilities. For instance, the Genetics Lab will allow soldiers to receive genetic modifications and the Cybernetics Lab allows soldiers to use mechanized cybersuits.

New weapons and equipment can be obtained from the engineering team in the Foundry.

Two new alien types and a new organization known as EXALT.

A new alien resource called Meld that can unlock new upgrades and weapons when recovered and researched on the base.

Players now have more options when creating custom squads.

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Smartphone players can also partake one-on-one and turn-based multiplayer matches. While the mobile version of XCOM: Enemy Within features multiplayer support for iOS and Android through Game Center and Google Play, multiplayer is not available on Amazon devices.The title starts going live in New Zealand on Wednesday, November 12 at 6 a.m. PST (November 13 at 3:00 a.m. NZDT ) and will roll out to U.S. app stores on Wednesday, November 12 at 9 p.m. PST. The strategy title is compatible with iPad 3, iPad mini 2, iPhone 5 and up. However, the game won't run on earlier generation iOS devices, even though users of these devices will be able to purchase the game from the App Store.

“XCOM: Enemy Unknown for Mobile proved that turn-based strategy games are a natural fit for touch interfaces,” said Ananda Gupta, lead designer at Firaxis Games, in a prepared statement. “In XCOM: Enemy Within, players can return to the XCOM universe, where they’ll encounter an assortment of new content including powerful new weapons, abilities and strategies, and confront a host of dangerous new alien threats.”

Core game XCOM: Enemy Unknown was ported to iOS in June 2013 and to Android in May 2014. You can glean more information about the latest XCOM mobile port by checking out our reviews for the XCOM: Enemy Within console and PC release and the XCOM: Enemy Unknown smart device port

Jenna Pitcher is a freelance journalist writing for IGN. You can follow her on Twitter