A fast-paced shooter. Full of intense fire fights, and immersive action. Albeit, the story is pretty shallow.
Killzone 2 takes place sometime after the first game, with the human race going into the world of the Helghast. Starting off, this game puts you in the middle of battle and doesn't let you go very often (if at all). Although the battles are fast paced and exciting, the story doesn't go into the characters' lives, and you never really feel connected to them. It's almost like it tries to develop a story and has a main idea, but it never really follows up on that. There aren't real "boss" fights, but there are plenty of tough Helghans and other enemies that you will encounter. So, although no collasal fights with you against a giant bug creature, you will have epic firefights that keep you thinking and developing strategy to finish your objective. The enemy A.I. is actually well done, and this is what makes for some good fights in the story mode.
Now for multiplayer (which redeems a lot of awesome qualities of the overall game). Starting off with basic weapons the farther you progress in level and rank online you get ribbons which in turn when you have enough give you medals. Medals are basically stat boosters for you when doing a particular match type (e.g. The "Body Count" medal allows for you when playing BODYCOUNT to get an increase in points for your kills.) Ranking up takes time once you get to the higher ranks, but for the most part when starting out it is a painless process. The higher your rank the more weapons and things you unlock. It's the simplicisty that wraps multiplayer together though. Fulfill the objective and win or lose...pretty simple. This is why games like Call of Duty and Halo are so huge. It gives you something to do and you do it, but of course other things start becoming part of the picture as well. In time I feel that this game will grow on people and it will start living up to the hype a little bit more. A great game no matter how you look at it.