Well, I beat it! That sure was a disappointing ending and final dungeon, all right. They didn't even give you an excuse to really use the shiny new weapon they gave you. No big final boss or cool encounter or anything. Just... over.
Steam says 14 hours, but my in-game time was around 9h 30m when I entered the final dungeon.
This game really seemed like it lacked focus. The shooting up dungeons part was a lot of fun, but the rest of the game felt really disjointed and a bit unnecessary in its current implementation.
Very fun action, but overall I'm coming away pretty disappointed RAGE, which I've looked forward to since its announcement. There's just too many bad or mediocre parts to it that drag down the core shooting experience, which is great. I hope they narrow their focus a lot for the sequel, but I can totally agree with the 6 and 7 scores this is getting. It's by all means above average in many areas, and worth playing if you like to shoot things, but the game is pretty damn bad in some areas.
Why the hell didn't they add a death match mode to this game, by the way? It seems perfect for it, and I'd love to mess around with the weapons in a PvP environment. Instead of spending so much time on all of the secondary stuff in the game, I personally would have preferred a more classic multiplayer experience. (I'm not really interested in the car combat multiplayer).