killzone 2 has 0% chance of being the halo killer, and nor does any other fps have a chance to be the halo killer. because a "halo killer" game doesnt exist or ever will. the thing that can challenge the halo series , is another halo fps ( halo4 and 5 and so on ). :)
GAMERTAG IS ANIMEHEAVEN X23
PSN ID IS : ANIMEREALM
PROUD MEMBER OF THE RPG FAN CLUB THREAD
ALL-TIME FAVORITE JRPG IS : LOST ODYSSEY