Jason Rohrer, maker of co-op story'em'up Sleep or Death and The Passage - the original game about walking - has let slip the tiniest morsel of information about his new project: The Castle Doctrine.
"The Castle Doctrine
a massively-multiplayer game of burglary and home defense by Jason Rohrer
Coming soon for PC/Mac/Linux."
And three screenshots, the header image and these two:
Is it someone burglarising? Home defence-erising? We haven't a clue, yet.