Reminder :
The Orange Box for 360 is a sure million seller but it has outdated 'Others' numbers.
According to this thread it has sold 120 000 in the UK alone while vgchartz track it at 0.16m for the whole 'Other' area.
http://www.vgchartz.com/games/game.php?id=7619®ion=All
http://vgchartz.com/forum/thread.php?id=28355
Add to this it's 96 at metacritic and it's a sure million seller...