The 'Magnum Pleasure Hunt Across the Globe 2' game, created by Lowe Brindfors, features a "pleasure-seeking" female character visiting various locations around the world, including New York and Rio de Janeiro.
The game, which is hosted on a dedicated site and goes live at midday today (3 April), has been integrated into Bing maps' Streetview to give it a rich web experience.
Lowe Brindfors sent a photographer around the world to take more than 6,500 pictures that are used in the game to create realistic locations. It also features brands in the scenes, including Quiksilver, Bulgari and KLM Royal Dutch Airlines.
Players must steer the character around the scenery using their keyboards to collect "cocoa nibs", which are the chunks of cocoa beans found in the Infinity ice-cream.
They can play directly against friends, and those who collect the most nibs in the shortest time will win. They can share their score with friends on Facebook and Twitter.
Mick van Ettinger, global senior vice-president at Magnum, said: "Having seen the success of last year's game, which became the most Tweeted web address in the world after just one week of launch, we look forward to witnessing another viral sensation."
Unilever launched the first game in April last year and claims to have attracted seven million players worldwide, who spent an average of five minutes taking part.
Unilever is continuing its push into digital marketing after an increase in spend of 15% in 2011.
As part of its digital drive, Unilever rolled out a 'Flush of Fortune' digital game for its Domestos toilet bleach brand.
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