Killzone is a much different game vs both you mentioned. It starts one match and switches between game modes within the match. The game modes are your deathmatch, single CTF, capture and hold, search and destroy(which is the attacking team has to plant two bombs in a certain place and deffend them until they detonate), and Assassination(a target is given and you must defend or kill the target) modes. There is a class system and each class has a certain abilities. You can only carry one main weapon and a side arm, which alot a people when they hear that think it sucks but you never realy worry about it once you get into a game. In a full loby the matches are beyond hectic with pretty much not a second passing between the gunfire and explosions. A realy fun and enjoyable game, I recomed it.
http://www.killzone.com/kz/index.psml
This might help with further questions
Edit: By the way I have the Site kit if you want me to email it to you. It contains maps of all multiplayer maps and all of the classes and their abilities.
