Format:
ORIGINATOR/AUTHOR. (Year of publication – in brackets) Game or program title – in italics. [Medium of item – in square brackets]. Series information and any dates or numeric information – if necessary. Place of Publication: Publisher

Bibliography example:
ELECTRONIC ARTS. (2003) The Sims. [DISC] PlayStation2. London: Electronic Arts Inc.

In-text citation example:
If you refer to a game or program in the body of your work, the title will need to be placed in italics: …as can be seen in The Sims (2003)…