Skill points and the acquisition of such are basically the ingame achievement system in Resistance: Fall of Man. According to the ingame system, I unlock Rewards at 10, 20, 40, 70, 100, and 126 points. However, I can't see what they are, as they're all behind strings of question marks.
Are there any gameplay advantages in the rewards, such as new weapons, or are they just extra like concept art or something?