Killzone developer talks on Neogaf and confirms that the trailer is pre-pre alpha.The game features highly atmospheric environments that respond accurately to weapon fire as players storm through the world of Helghan. The harsh climate and conditions of Helghan are also a factor, forcing players to adapt new tactics to survive.
"Don't forget one thing: This game is PRE-pre-alpha! So, not PRE-Alpha, PRE-PRE! So, please don't start some "Hey, can you see that texture poppin' up! PLEASE, stop it, ok? There will be much more details, effects and so on. Give us some time."