The figure includes all versions of the games that were released in 2008. The action-horror shooter Dead Space was available on PC, PS3 and Xbox 360, while the first-person parkour game Mirror's Edge hit PlayStation 3 and Xbox 360 in 2008.
As the PC version of Mirror's Edge followed the console editions in mid-January of 2009, its sales numbers were not reflected in the total 2008 sales.
Very much looking forward to Mirror's Edge 2, as long as DICE takes the primary (and as close to unanimous as you're likely to get from the gaming audience) criticisms to heart.
I'm stoked about both of these I really enjoyed most of Mirror's Edge, but there's a lot of room for improvement in a sequel. I have a good feeling about it.
Dead Space was my favorite game in 2008, at least of those I played.