Sucker Punch has asked owners of an "unauthorized early copy" of Infamous: Second Son to stop posting spoiler footage ahead of next week's release.

The developer's comments follow footage posted online earlier in the week revealing the first 20 minutes of the game.

"Everyone here at Sucker Punch is extremely excited about inFAMOUS Second Son hitting stores on Friday, March 21st, but we're a little disappointed that people are releasing unauthorized footage of the game online before it officially launches," the developer wrote on Facebook.

"We've all worked really hard over the last two years to not let any spoilers slip. We want to keep some of the most enjoyable moments of the game a secret for fans to experience first-hand when the game comes out. We think the game is a lot more fun to play when you don't know what's coming next--when you experience the thrill of an unexpected twist in the plot, or get to enjoy a new super power you'd never dreamed of.

"We really appreciate how excited everyone is to actually play the game, and we're just as excited for you, because we think Second Son is awesome and we think you're going to love it. So please, we kindly ask that you join us in helping ensure everyone gets to experience the game for themselves on launch day. We'd really appreciate you refraining from forwarding links around, and please, please, please don't post spoiler footage if you have an unauthorized early copy."

Sucker Punch has tried to keep secrets in store for next week's launch, with further powers available to player character Delsin Rowe yet to be revealed.

Infamous: Second Son launches exclusively on PS4 next Friday, March 21.

AMENDMENT: This article originally incorrectly stated that "two of the four powers available to player character Delsin Rowe" had yet to be revealed. The total number, however, has yet to be confirmed. Sucker Punch states that there are "a lot more" powers still to be revealed in addition to the previously announced Smoke and Neon.