World Of Warcraft ($10bn)
An online, Dungeons and Dragons style fantasy game, World of Warcraft has sold more than 10 million copies. The secret to its profitability is its business model. In addition to stumping up for the game, players have to pay on average a $13 per month subscription.
Call of Duty Black-Ops ($1.5bn)
Released in 2010, this gritty shooter sold 23 million copies in the first four months of release. A 2012 sequel grossed $500m within 24 hours.
Mario Kart Wii ($1.4bn)
A rare video game blockbuster that appeals to kids as much as adults, this day-glo romp was the first big hit for Nintendo's Wii console.
Grand Theft Auto series ($1.25bn)
The four Grand Theft Auto and a myriad of expansion packs have already made Rockstar one of the biggest forces in gaming. Will GTA V live up to expectations and bring in a further $1bn?
Wii Play ($1.2bn)
Another child-friendly title from the Wii Play's array of accessible party games. Available bundled with the Wii console or as a stand-alone, it has sold 28 million copies.