Similar to its predecessor, Killzone 2 takes place in the 24th century and chronicles the war between two human factions; the Vektans, and the Helghast. The game takes place two years after the events of Killzone and follows protagonist Tomas "Sev" Sevchenko as he and his unit battle the Helghast as the Vektans invade Helghan. The protagonist of Killzone and Killzone: Liberation, Cpt. /Col. Jan Templar, returns in a supporting role, along with Rico Velasquez. Killzone 2 is played from a first-person view and allows the player to use a variety of weapons. It was released worldwide in February 2009.