Killzone 3 has split-screen multiplayer. It's true, Guerilla Games confirmed it earlier this week.
Check out this video of it in action. A whole six minutes of co-op action as two players take on the giant boss, dubbed the MAWLR which was revealed early last week. It's quite epic.
Killzone 3 is out February 22, 2011. It supports both the PlayStation Move and Stereoscopic 3D.