https://www.gamespot.com/articles/were-giving-away-xbox-one-closed-beta-codes-for-de/1100-6458584/

We're giving away 1,000 Closed Beta codes for Defiance 2050 on Xbox One (worldwide). In Defiance 2050’s version of San Francisco, players are transported to a dynamic open world where they can explore and fight in skirmishes and story-driven missions on an epic scale.

Entry is open worldwide on Xbox One. For North America codes on PS4, go here.