One of the leading interactive groups to come out of Britain is the Blast Theory who are making interactive gaming projects, installations and mixed reality projects in various major cities of the world. They were based in Adelaide from January to March 2004 under the South Australian Premiers Thinkers in Residence Program in partnership with various other major Australian art corporations. Through the use of real and virtual city cityscapes there is an overlapping of concepts of time and space, with a focus on ideas of absence and presence amongst players online and those on the streets.