Easily.

All of Sonys games had mild openings but long ass life's. Uncharted 133k opening is at 2.3 R2 400k now at 1.5

It has bundles of it already...

As of Killzone 2's fourth week of sales it sits at 1.24 million.

Using only ps3 titles...

As of Haze's fourth week of sales, it was at 277k. It now sits at 730k, a 160% increase.

As of CoD4's fourth week, it was at 969k. It now sits at 4.1 million, a 223% increase.

As of CoD:WaW's fourth week, it was at 1.523 million. As of now, it sits at 3.10 million, a 103% increase, and it is far from being done selling.

As of RSV2's fourth week, it was at 402k. Now it sits at 1.07 million. a 166% increase, and it'll probably sell small amounts for the next year or so.

I can't think of another example that doesn't fall in between Haze and CoD4. This means that at worst Killzone 2 will increase its current lifetime sales by 160%, and that's assuming the game has either bad word of mouth like Haze, or little to no word of mouth like RSV2, both of which are unlikely.   Hell, the game hasn't even had its first holiday season yet, unlike the above four titles!

1.24 * 2.6 = 3.22 million. The game should sell at least 3.22 million lifetime.

I find it funny how many times I've seen people say Killzone 2 won't break 3 million, sometimes even saying it'll die off between 2 and 2.4 million. This makes no sense, and I honestly have to wonder if these people can do basic math, or if they have any analytical skills at all. :P

Edit: Beaten badly by Wiistation.  =/

I have one small correction.

It will sell exactly 3,476,308 LTD.

Yeah i think alot of people are underestimating this game.  It looks fantastic, ah how i wish i had a PS3 for games like these!!

 Umm I don't know where you are from but uncharted was a giveaway game here in the uk with a ps3 purchase in 2007.  I  also know this was not a promotion for the UK Only.  So YES, uncharted was bundled/given away from the beginning.  It's a great game bit its sales are extremely deceiving and misleading as far as predicting future game sales.  Welcome to reality

The so called truth from the perspective of a ps3 fanboy (judging by your tags and emphatic defense of all things sony) who refuses to debate facts is a vacuous and dreadul fantasy land indeed.

3 million will probably be reached by the end of the summer if not sooner.

i think it will just croos the 3 mil mark

So you are saying you will buy over half a million copies of that game to help it reach 3 million sales ltd?

 The rate Killzone 2 is selling it will be lucky it reaches 2.5 million sales ltd. New shooters are on the way: MAG, Call of Duty: Modern Warfare 2, new  Wolfenstein, Metal Gear game and many more shooters for PS3.   Shooter genre is the most over saturated genre on the game market. People go on about X360 being predominantly a shooter based console. IMO PS3 is probably more shooter based console than X360.