I beat it in two days, I need more
... get your credit card ready - can't you tell, rage was designed for DLC... me, I won't be paying for a single thing.. though I wouldn't be surprised if they make you upload your custom maps to the steam cloud and then charge a membership for "Community DLC" (I know that won't happen, they aren't dumb enough to try to charge without paying the community, but the lawsuits would be great).
in reply to the post above:
Megablurs.. I mean textures... they are GIGANTOR! .. this explains why Rage feels 1/2 done though.