The secret paramilitary organization known as XCOM is largely forgotten, and must strike back to reclaim control of Earth and free mankind from the aliens’ rule.

In XCOM 2, the roles have been reversed, and XCOM is now the invading force. They are hampered by limited resources and must constantly evade the alien threat in their new mobile headquarters. Players must use a combination of firepower and stealth-like tactics to help XCOM recruit soldiers and build a resistance network, while attempting to expose the evil alien agenda and save humanity. XCOM 2 will introduce gameplay features such as procedurally-generated levels, which will make each experience unique to the player, as well as offer a much deeper level of modding support. Additionally, XCOM 2 will offer a variety of new content including five updated soldier classes, increased soldier customization, more alien and enemy types, evolved tactical combat and more.

This weekend only, all Xbox Live Gold members can enjoy 2K’s turn-based strategy hit, XCOM 2 for free as part of Xbox Live Gold’s Free Play Days.

Beginning at 9:00 a.m. PT on Thursday, October 26 and running through to 11:59 p.m. PT on Sunday, October 29, Xbox Live Gold members in Xbox One markets will get a special opportunity to fight for the future of humanity.

During the week, you’ll also have the option to purchase XCOM 2 or XCOM 2 Digital Deluxe from the Xbox Store at 60% off. Should you decide to return to the fight later, all of your achievements and saved-game progress will be waiting for you.

You can download XCOM 2 starting at 9:00 a.m. PT on October 26 by clicking on the Gold Member area on the Home Dashboard or downloading directly from the Xbox Store.