From Sony: In Killzone: Liberation, two months after the events of Killzone, most
of southern Vekta is still under Helghast control. The rules of war have
been cast aside with the Helghast General, Metrac, employing brutal measures
in order to seize the initiative and strengthen his position further.
Returning as Templar, players will be sent on a mission to undertake a covert
operation to save hostages captured by Metrac, while ISA troops continue the
fight for liberty.