Since I was the one who made this nomination, I feel like I also have to write something about it ^^
The reason I picked these two games was, that I find quite many arguments both for and against each one...
Killzone 2:
+ outselling L4D on a weekly basis
+ good critics, very hyped up title
+/- the release of the slim PS3 gave it a boost recently, but that could be shortlived -> weekly sales could drop quite a lot in the coming weeks
- the PS3 users aren't as crazy about fps
- smaller userbase, especially in the US (= usually home of most fps sales)
Left 4 Dead:
+ quite a big head start
+ fps sell better on the 360
+ bigger userbase, especially in the US
- being outsold on a weekly basis
- Left 4 Dead 2 is going to be released soon, so that could break its legs
All in all, I doubt that Killzone 2 will outsell Left 4 Dead. I expect weekly sales to go down as were moving further away from the slim release, also there will be much competition with Modern Warfare 2 to be released soon. Killzone 2 will still outsell Left 4 Dead (weekly), especially when Left 4 Dead 2 is released, but it won't have long enough legs to catch the 450k headstart. Maybe a tie.







