This is an honest and fair review of the game. I have beaten the Single Player and played an extensive amount of MP.
The Bad:
1. The controls in this game are pretty weak. I hate the fact that I can not truly reconfigure my controls to my personal liking. The player is pretty much forced to choose from about 8 different control schemes all of which I did not like. For example, the crouch button is ALWAYS L2, which means if i wanted to make my 'aim' control to L1 it would make it impossible for me to duck and aim at the same time unless I used both my index and middle fingers at the same time. The controls are also sluggish. It takes less than a second for the character to react to the joystick, which frustrated me at first. Eventually the player will get used to it and it won't be that big of a deal.
2. the 'tacked on' motion controls are weak in the game as well. When the player needs to plant a charge on an objective, he or she is forced to use to motion controls to plant the bomb. This is a cool feature at first but it quickly becomes annoying. The zoom for the sniper also forces the player to keep a steady hand otherwise the zoom will go out of focus. (VERY ANNOYING). Of course Killzone 2 had to something with the motion controls to make it truly 'Playstation 3', but I just feel that the developers merely tacked the feature on the game to simply make Sony happy.
3. The story and voice acting in the game is horrid. Even the characters themselves are very unmemorable and ugly. Gears of War had cheesy lines, but they were cool and fit the environment. Killzone 2's voice acting is simply stupid and way too cheesy that it takes away from the overall feeling of chaotic war. The story is also very bland and unexciting. If you thought the well done opening scene would steer the game into a great story driven game, well you thought wrong. The enemies in the game also have stupid corny lines that don't really intimidate the player at all.
4. The MP is very deep. Players are forced to level up like in the Call of Duty games, which is cool and adds to the replayability of the game. This of course doesn't cure how boring the MP actually is. Yes it is intense, but it isn't fun. It's slow, unmemorable and bland. Although the level design on the MP maps are rather nice. I did not find any real lag with the game unlike some other shooters out there.
The Good:
1. The action is amazingly chaotic. When you are fighting side by side with your AI controlled buddies it really feels like your in the middle of a battle. The main battle rifle in the game is the best weapon in the game by far and looks really cool from the first person perspective. This game is all about set battles with about 20 red eyed foes hurling bullets your way, and it's hella fun.
2. The AI in the game is challenging and fun to battle with. The enemies will hide behind cover and act like you would think smart AI would act when they have a horde of enemies shooting and throwing grenades at them. They will not be afraid to run around your cover and rifle butt you in the face though.
3. The graphics are stunning. From the environments to the motion blur on your rifle, this game is hands down the best looking first person shooter on any platform.
4. The sound design for the weapons and all of the ambience in the levels are great. I just wish the same went for the voice acting.
5. The physics in this game are very fun. Shooting baddies causes them to react like you would expect them to. The same goes for the first person perspective camera. When the player jumps the gun and camera reacts like you would expect it to.
Overall: If you look past the hype this game had and judge Killzone 2 for what it REALLY is then you will enjoy this game. This is a first person shooter that doesn't really bring anything new to the table but it's a lot of fun.