It's Week Two of the Virgin Media Game Space, and the theme for the coming seven days is the use of audio in gaming.
To highlight the importance of music - and how sound is used to help create great games - Virgin Media has created a 'Cello Fortress' at London's Silicon Roundabout.
Gamers are sent into battle against live cellist Joost van Dongen, who defends his virtual fortress by improvising on his string instrument.
Players from the audience use conventional game controllers to drive on-screen tanks and see if they can outwit the musician.
Playing fast, high notes on his cello fires guns, while discords control the flamethrowers and low notes activate land mines.
Virgin Media describes 'Cello Fortress' as "an incredible fusion of live music, tower defence fun and uniquely engaging gaming innovation".
If you're visiting the Virgin Media Game Space this week and would like to take on Joost in battle, book online at http://www.vmgs.com/week/02/.