Dno on 19 July 2009
its easy halo 3 has way more features. 4 player co-op. great controls. huge online features its just a great game. has clans and match making where you can bring all your friends. etc
Killzone 2 they had to update the controls. no co-op offline or online. plus many other things
(and this is coming from a sony fan who owns both btw)
both great games but halo has it in almost everything but the graphics.
