In the past we could test 2010 GamesCom a playable demo of Killzone 3. Durante la sesión de juego, observamos como en un cartel se advertía la siguiente leyenda: During the play session, we observed that in a cartel warned the following legend:

Players: 1-2 (offline) 2-24 (online) Players: 1-2 (offline) 2-24 (online)

Todavía falta que Sony confirme este dato, pero el especulado modo cooperativo para dos jugadores a pantalla partida puede confirmarse para Killzone 3 en los próximas dias. Sony still need to confirm this information, but speculated cooperative mode for two players split-screen can be confirmed for Killzone 3 in the coming days.

Killzone 3 saldrá de forma exclusiva para PlayStation 3 el 2 de Febrero del próximo año. Killzone 3 will be released exclusively for PlayStation 3 on February 2 next year.

Source

That would drastically make this game more appealing. It was the lack of 2-4 player co-op, and the wonky controls in Killzone 2 that killed that game for me. I couldn't even finish it, but then again this could be a start. Lets hope this is true.

was it not confirmed that there was a seprate campaign that was coop? im sure i read that somewhere