Project: Mastercard keep it hidden
Writer: McCann Erickson
Art director: McCann Erickson
Designer: Athila Armstrong
This interactive game was developed by Unit9 as part of the "keep it hidden" through-the-line campaign running for Mastercard around Christmas last year.
The lengths people go to to hide their Christmas presents from each other formed the theme of the activity, which encouraged one person to hide a present in a virtual house and then challenge a friend to find it.
Those who could figure out where the present was buried entered into a prize draw for £1,000 to pay off their Mastercards. Over just four weeks, the campaign had attracted 260,000 unique visitors and more than 18,000 entered the competition.