This is splendid, and slightly mysterious. Beneath the click is a kind of promo video for DM-Spectrum, an Unreal Tournament 3 deathmatch level by Matt Bradley. He’s created a kind of disco battlefield, which, according to his Vimeo page, he hasn’t yet distributed. It seems that players have to navigate via the disco light flags to find their enemy, but it’s not obvious how that works. I’ve dropped Mr Bradley a line and will report back with more when I know more, or get hold of the map itself. In the meantime, have a look at the intriguing video below.