The sound design in Killzone 2 is noteworthy, with a gripping soundtrack and realistic sound effects that immerse players in the game's world. The voice acting is also top-notch, with convincing performances from the cast.
In recent years, optimization has improved significantly. With a modern CPU (like a Ryzen 7 or Intel i7), you can play Killzone 2 at 4K resolution and 60FPS, which looks significantly better than it did on original hardware.