Killzone is a series of shooters exclusive to PlayStation consoles. The first part was released back in 2003 on PS2, and several shooters from this franchise even made it to PSP and PS Vita.
The plot of Killzone tells about the distant future, in which one of the planets, colonized by the inhabitants of the Earth, is attacked by powerful aliens. The story is always about two planets - Helghan and Vecta, between which there is a constant war, and some armed conflicts are replaced by new ones.
This list includes all games in the Killzone series, regardless of the year of release and gameplay features.