Though it was available in Steam Early Access before - Studio Monolith's Super Monkey Ball/Marble Madness inspired game has officially launched, and is enjoying a 20% discount on Steam right now.

"There's a lot to do in Polyball -- Challenge yourself or a friend to one of over 60 levels included in the initial release, with plans for many more levels via DLC. If you've got some friends over and are looking for something to play, Polyball's splitscreen multiplayer promises a good time. With classic modes like Battle and Trails, as well as a multiplayer version of the single-player experience, Polyball promises to be a must-have party game."

You can also check out the launch trailer, and some screenshots below: