As he often does, Peter Molyneux has promised that his next game will be a doozy.

The creator of games like Fable and Black & White is releasing an experimental game called Curiosity for PC, Android, and iOS. The concept is that players all around the world can click to tap away at a black cube, simultaneously chipping at it until it finally cracks. When it opens, it reveals a hidden secret. The catch: only the player to open the cube gets to see the secret.

Speaking at the Rezzed conference in Europe today (as reported by Eurogamer), Molyneux said Curiosity will be out August 22. He also said what's hidden inside the cube will be "so valuable, and so life-changingly important."

"It's so amazing I think it will appear on news reports," Molyneux said, "though it's not a dead cat, by the way."

Life-changing... but not a dead cat? Well I'm certainly stumped.

Molyneux's next game Curiosity dated, detailed for iOS, Android and PC [Eurogamer]