[quote name='Rei no Otaku']Doesn't matter to me how much money it made. All I'm saying is the more important number is how many people actually bought the game. If more people bought Halo 3 than went to see the biggest movie ever made (I don't know what that is), then I'll be impressed.[/QUOTE]
Well movie sales aren't based on tickets sold, they're based on net $, as ticket prices vary across the country.
EDIT: The highest grossing movie of all time was Titanic:
1 Titanic (1997) - 20th Century Fox / Paramount $1,845,034,188
2 The Lord of the Rings: The Return of the King (2003) - New Line Cinema $1,118,888,979
3 Pirates of the Caribbean: Dead Man's Chest (2006) - Buena Vista/Walt Disney $1,066,179,725
Titanic is a real rarity though, it was played for 9 months straight throughout the entire country. LOTR: ROTK is probably the most accurate in terms of a "best grossing" movie during a normal run, but at the same time you have to consider that people go to see movies like ROTK more than once, and thus double/triple/etc ticket sales, whereas video games most people only buy one copy (albeit at a higher price). There aren't any great indicators of ticket sale numbers (per individual) for movies.