It's an unusual game, and we need more unusual games. You move an invisible avatar across a building blueprint, listening to past conversations in order to solve mysteries.

What is most interesting is that while Unheard focuses on hearing, the best clues and 'aha' moments come from silent pauses, from what isn't spoken.

But the game feels like a demo. After a handful of scenarios Unheard suddenly ends with a hackneyed twist that doesn't justify its central conceit.

The real deal breakers are the over-written script and the awful voice acting – killshots for a game that's all about listening.