Described as a singleplayer "first person action adventure puzzler" with "innovative physics based gameplay" using the titular sphere, The Ball is set in cavernous ancient ruins beneath a Mexican volcano--unfortunately inhabited by mystical monstrosities.

"We are really happy to see The Ball get a full commercial launch. It is the first UDK-based game to get into stores and the previews show just how much a group of talented developers can achieve with the toolset," said Mark Rein, vice president of Unreal Engine creator Epic Games, in the announcement.

"Like previous success stories from the Make Something Unreal contest, such as Red Orchestra, it is a highly-polished standalone product--and a great fun game, too! This is a great example of why we put the effort into supporting the community with the UDK and the MSU contest."

Priced at $19.99, The Ball will be released for download on Steam and "eastern European" retail stores on October 28. Steam pre-orders will begin on October 18, offering the "special exclusive bonus" of unlocking a playable version of The Ball's main character in Tripwire's co-op survival shooter Killing Floor if you own both.

"Soon after" launching, Tripwire says, The Ball will also roll out to other digital distribution platforms and receive a worldwide retail release.

To get a taste of The Ball, head on over to FileShack to download a 360MB UDK standalone version of the original mod--though of course it's not representative of the full game.