"It's December 4, and from now on December 4 will be Killzone 2 day! What about 12 gameplay videos from the single player preview version of the game? Let's all thank TTP for his time and great work with all these! It's important to note that the videos are getting more and more spoiler-ish as you go down the news, so keep that in mind. Not that the story is what really matter in such an impressive game ;)"
UPDATE: Gamersyde has just taken down all videos. Apparently, the news shouldn't have gone live this early, but will go back online in 2 hours (11pm GMT).
UPDATE: They are back up!