I like my FPS and I always thought that the original Killzone was under appreciated. This game takes all the fast action and movie-like story of the original and ups the ante. It's great to look at, plays wonderfully and certainly gets your heart pumping.If you haven't go this then get it. If you haven't got a PS3... well, buy one.
Another game I love and really regret trading in is Fallout 3, the post apocalyptic game from Bethesda Game Studios. Now that I've finished Killzone 2 I think I'll trade that in for it. I know there's lots of amazing multiplayer action on Killzone 2 but I'm not a big multiplayer shooting fan (except for GTA IV, because there's the free roam option which is always fun when you team up with other players) and now that I've finished the main single player game there's no more surprises for me. I never truly completed all the missions in Fallout 3 and would really love to revisit it, and now that the Game Of The Year Edition has been released I can enjoy all the extra content, too.