Trion Worlds has launched the first official PC beta for their upcoming, massive open-world shooter, Defiance.

The beta will last until Sunday, the 20th, so hopefully you’ve managed to sign up. If not, we’re still giving away keys. Head on over to our forums for some last minute copies! You can use them to sign up here.

Trion Worlds reminds everyone on Twitter, “If you have entered a beta code you’ll need to wait for an e-mail invite before you can download the client! If you have applied a code and not received your invite – please e-mail community@defiance.com. If you have entered a key within the past 2 hours you still might not have gotten your invite yet. Be patient folks!”

Trion worlds will also be live streaming the beta today at 4:30 PM PST. You can catch that on their official TwitchTV channel.

Make sure follow Defiance on Twitter and check out their official Facebook page.

Defiance launches this April on the PC, Xbox 360 and PlayStation 3.

Have you had a chance to try it out yet? What are your thoughts so far?