Sales not great for an FPS game. I think it is more of an effect of the FPS genre being much more glutted than ever before.
I disagree with everyone that says this game should have launched in Christmas-time. Strong titles hold up in sales regardless of their time of release. Just look at God of War 3 sales last year which it launched about the same time as KZ3.
Fall and Christmas season are already too front-loaded with FPS games-- KZ3 wasn't likely to do much better then either. I would say that a shooter game has to hit at least 5 million in sales to be considered premier like Halo, Gears of War, Medal of Honor, Bad Company, and Call of Duty.
A few reasons for Killzone 3's decline:
1. Less than stellar reviews.
2. Too many other FPS games people are looking forward too: Bulletstorm, Homefront, Crysis 2, Brink, BF 3, MW3, Rage, SOCOM 4, etc.
3. People are still enjoying their other FPS games like Black Ops and Bad Company 2 : Vietnam
4. A lot of people that played Killzone 2 were let down by the experience
5. The entire game was recently leaked onto the internet. Maybe piracy is finally taken its toll on PS3 software sales?
Most anticipated games of 2011:
Uncharted 3,Legend of Zelda: Skyward Sword, Rocksmith
Modern Warfare 3, Super Mario 3D
