Ghostbusters: The Game sales top 1 million

Ghostbusters: The Game sold 440,000 units in its first two-and-a-half weeks on sale in the US, according to June data from market research company NPD Group. However, according to developer Terminal Reality, the game's worldwide combined sales to date have actually topped a million units.

This total puts it ahead of any other film tie-in videogame released in 2009 so far, says Kotaku, including X-Men Origins: Wolverine, Terminator: Salvation and Transformers: Revenge of the Fallen - all of which are based around far more recent box office hits.

The Terminal Reality game was in development for more than two years, originally the brain child of publisher Vivendi, which conducted a survey of gamers to find out which classic movie they would most like to see made as a game. Ghostbusters came out in the top five.

Dan Aykroyd recently said in a magazine interview that the title had cost between USD 12 - 15 million to make, although other reports have stated it was as high as USD 20 million.

The same NPD data showed Transformers: Revenge of the Fallen had sold a more modest 296,000 units and THQ's Up - based on the Disney/Pixar film - had sold 270,000 up until the end of June.