Call of Duty: Modern Warfare 2 hit another milestone as the best-selling video game has passed $1 billion in retail sales since its launch in November.

Activision Blizzard’s record-breaking game is second only to James Cameron’s Avatar film, which also passed $1 billion and is on its way to passing up Titanic as the biggest box office hit of all time. According to BoxOfficeMojo, Avatar has generated $1.34 billion in sales so far. More people have seen the film, since movie tickets cost less than the $60 game. There’s a kind of race between the two properties going on.

In the first five days Modern Warfare 2 beat Avatar by generating over $550 million in sales.