guys here is the disclaimer GG sent with the game and said those mentioned ares till being worked on:


Known Issues

As Killzone2 is work-in-progress and still needs to go through Quality Assurance, the
Killzone 2 Single Player Preview Code does not accurately represent the final retail copy
of Killzone 2. These elements will be remedied for the final Game. Game elements which
are still under development may have been omitted or included in an un-optimized,
placeholder state. These include the following elements:

- Game Intro cinematic, in which the backstory is further explained, is not yet
available.
- Front/end menu designs are placeholder and will be replaced.
- Loading screen content missing. This will display various elements such as
gameplay tactics as well as background on the main cast.
- Dialog / Voice acting - The voice samples for both the Buddies and Helghast are
place holder.
- Cut-scenes have not gone through final polish in visual effects, sound effect,
facial animations and syncing voices
- Several Character Animation glitches can be spotted, most noticeably during
transitions.
- In some rare cases enemies or buddies can create progression issues. Try
Restart Checkpoint from the Pause menu to continue.
- Pay attention to the buddy and objectives in cases where the Direction finder (dpad
UP) system isn't implemented correctly yet.
- Volume balancing for sound effects, music and voices has not been completed
for this version, resulting in louder than normal speech or sound effects as well
as audio cutting out. Suggested setting in the Options / Sound menu:
music=100%, speech=80%, sound effects=70%
- Brightness settings are not yet balanced for all screens - The option menu has a
brightness setting that can be adjusted to overcome overly dark areas.
- Ragdoll issues might occur when many explosions are triggered.
- The Lighting setup of the Suljeva Village mission is unfinished.