Killzone 2 features eight well balanced multiplayer maps that take place in different settings around Helghan. Each map has a specific character and requires different tactics in order to be victorious. On the website, there's short tutorials that will introduce the different maps.
*Note: The actual article is located at this link:
http://www.killzone.com/kz/news.psml
Which is dynamically updated, so it keeps the same url, therefore the story's actual link shows as "already submitted" to N4G, although the story itself has not been.