Microsoft has revealed that the Rock of Ages 3 open beta is now free to download on Xbox One.

The third entry in the series retains its unique brand of competitive tower defense and arcade action, complete with an "expansive" story mode and the ability to create and share your own levels online for the first time. Furthermore, there's two-player split-screen and four-player online multiplayer as well.

You can grab the beta right now from the Microsoft Store, which has a download size of 2.97GB. The full game releases on July 21, with digital pre-orders including a playable "retro" boulder.

Jump into the expansive, gut-busting story for an eclectic adventure featuring bizarre and irreverent takes on legendary characters, or for the first time, create and share your own levels to compete with friends and strangers online in a real-time mix of hectic tower defense and epic boulder-racing arcade action.

Are you a fan of the Rock of Ages series? Planning to download this beta? Let us know below.