Killzone/Trivia

Dueling Games: According to the wiki, "Killzone was originally slated as a Halo Killer by Sony. However, the developers have stated that they never intended it to be a Halo Killer, but merely as a good game. The moniker of Killzone being a Halo Killer was due to false marketing." However, by this point the games are marketed towards two different audiences making the statement "competing franchises" redundant.
Fake Nationality: The American accented Sinclair is voiced by British actor David Harewood.
Hey, It's That Voice!: Brian Cox as Scolar Visari, Sean Pertwee as Hakha and Radec, and as of Killzone 3, Malcolm McDowell as Stahl and Ray Winstone as Orlock.
What Could Have Been: The reaction of some fans towards the outcome of the fight over Visari's succession, mainly those who had hoped for a full scale civil war between the successors. The actual conflict ended up being mostly angry words between Stahl and Orlock.