I've played each Killzone game save for the PSP game, and I like to consider myself a pretty big fan of the series, despite how shitty the first game for PS2 really is.
That being said, there are spoilers coming up, so if you haven't beaten Killzone 3, stop reading.
Last warning
Ok, so, here is my problem with Killzone 2 and 3. The ISA. It's easy to just look at the game and say "Oh, Helghast are the bad guys, ISA are the good guys, nuff said." If you actually read the extended backstory, you find it VERY difficult to side with the ISA. The Helghans used to control Vekta AND Helghan, and had a monopoly on the commercial shipping lanes. The UCN and ISA didn't appreciate the control the Helgans had over the shipping lanes, and so they waged a war over it, with the UCN and ISA winning, condemning the people to a harsh existence on the volatile planet Helgan.
Yes, thats right: The Helghan people were kicked out so the ISA could take control of the shipping lanes on their own terms, and put onto a planet that would likely kill them.
Now, the Helghans view the ISA and UCN as imperialist aggressors, and are attempting to gain control of Vekta, what they view as their rightful planet. Now, Killzone 2 and 3 attempt to villify the Helghast forces, given their treatment of POW's, killing their own soldiers for uniform infractions, etc. However, it's easy to see their justification for war. After their loss in Vekta, they are faced with an ISA invasion of their own planet, fueling Visari's propaganda that the ISA are the real aggressors.
Now, the 3rd game is where I cannot feel any sympathy with the ISA. Rico disobeys direct orders due to his absolute hatred of the Helghast. It starts with his killing of Visari, against orders, which leads to the massive Helghast counter-attack due to Visari no longer having control of all the generals, and more importantly, Stahl. While Stahl did want to destroy the UCN forces on Earth with his fleet, he did NOT want to attack Vekta with those weapons, since reclaiming Vekta was their entire goal. Stahl wanted to take the UCN out due to their initial invasion, and to keep their influence out of both planets. As a result of Rico's absolute hatred, he winds up decimating the majority of Helghan and its population, with no remorse for any innocents that may have been caught in any of the blasts.
After that ending, I fully side with the Helghast. Picture how this looks to the rest of the universe: The ISA surrenders and is in the process of negotiating the terms when the planet of Helghan is decimated by rogue ISA military members. Fuck the ISA.
Edit: Also, if you think I'm alone in this thought, you would be wrong. There are many people who have sympathy for the Helghast and a deep hatred of Rico, and for the ending of KZ3.
Post edited April 26, 2011 by Wraith